Starting control method, device, electronic device and storage medium of wind and smoke system

Abstract

The present disclosure relates to a start-up control method, device, electronic device and storage medium for a wind and smoke system, and relates to the field of thermal power generation. The present disclosure first starts the first induced draft fan, and adjusts the first blade opening of the moving blade of the first induced draft fan through a first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure. The proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first blade opening. Then, the first forced draft fan is started, and the second blade opening of the first forced draft fan is adjusted to adjust the boiler air volume to a preset target boiler air volume. By adopting the above scheme, the automation level of the start-up of the boiler wind and smoke system is improved, the start-up of the boiler wind and smoke system is made more stable, the start-up process of the boiler wind and smoke system is accelerated, and the reliable and efficient operation of the boiler is ensured.

Description

Technical Field

[0001] The present disclosure relates to the field of thermal power generation, and particularly to a method, device, electronic device and storage medium for starting and controlling a wind and smoke system. Background Art

[0002] The wind and smoke system is an important auxiliary system in a thermal power plant. The wind and smoke system is responsible for the stability of the boiler air volume and the furnace negative pressure during the boiler combustion process, and its startup process directly affects the safe and economic operation of the boiler.

[0003] In the related art, the wind and smoke systems of thermal power generating units are not designed with an automatic startup function. Manual operations need to be performed on the DCS (Distributed Control System) interface to start each device in the wind and smoke system in sequence. This is prone to human operation errors and has a low automation level, affecting the reliable and efficient operation of the boiler. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a method, device, electronic device and storage medium for starting and controlling a wind and smoke system.

[0005] According to the first aspect of the embodiments of the present disclosure, a method for starting and controlling a wind and smoke system is provided. The wind and smoke system includes a first induced draft fan and a first forced draft fan. The first induced draft fan includes a first movable blade of the induced draft fan, and the first forced draft fan includes a first movable blade of the forced draft fan. The method includes:

[0006] Starting the first induced draft fan, and adjusting a first movable blade opening of the first movable blade of the induced draft fan through a first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure. The proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first movable blade opening; and,

[0007] Starting the first forced draft fan, and adjusting a second movable blade opening of the first forced draft fan to adjust the boiler air volume to a preset target boiler air volume.

[0008] Optionally, before adjusting the first movable blade opening of the first movable blade of the induced draft fan through the first proportional-integral control algorithm, the method further includes: adjusting the first movable blade opening to a preset first initial movable blade opening value; and / or, before adjusting the second movable blade opening of the first forced draft fan, adjusting the second movable blade opening to a preset second initial movable blade opening value.

[0009] Optionally, the adjusting the first movable blade opening of the first movable blade of the induced draft fan through the first proportional-integral control algorithm includes:

[0010] Determine the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm from a plurality of preset proportional coefficients and integral coefficients according to the first moving vane opening;

[0011] Adjust the first moving vane opening through the first proportional-integral control algorithm according to the target furnace negative pressure and the current furnace negative pressure;

[0012] Repeat determining the target proportional coefficient and the target integral coefficient from a plurality of preset proportional coefficients and integral coefficients according to the first moving vane opening to update the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm.

[0013] Optionally, adjusting the second moving vane opening of the first forced draft fan includes:

[0014] Increase the second moving vane opening according to a preset first opening increase speed until the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to a preset ratio threshold;

[0015] Adjust the second moving vane opening by using a second proportional-integral control algorithm according to the target boiler air volume and the current boiler air volume.

[0016] Optionally, the air and flue gas system further includes one or more second induced draft fans and one or more second forced draft fans. The second induced draft fan includes a second induced draft fan moving vane, and the second forced draft fan includes a second forced draft fan moving vane. The method further includes:

[0017] Start the second induced draft fan, increase the third moving vane opening of the second induced draft fan moving vane according to a preset second opening increase speed until a first preset condition is met, and adjust the first moving vane opening and the third moving vane opening through the first proportional-integral control algorithm;

[0018] Start the second forced draft fan, increase the fourth moving vane opening of the second forced draft fan moving vane according to a preset third opening increase speed until a second preset condition is met, and adjust the second moving vane opening and the fourth moving vane opening through the second proportional-integral control algorithm.

[0019] Optionally, the first preset condition includes that the ratio of the third moving vane opening to the first moving vane opening is within a preset first ratio range, and the ratio of the first current of the first induced draft fan to the second current of the second induced draft fan is within a preset second ratio range; the second preset condition includes that the ratio of the fourth moving vane opening to the second moving vane opening is within a preset third ratio range, and the ratio of the third current of the first forced draft fan to the fourth current of the second forced draft fan is within a preset fourth ratio range.

[0020] Optionally, the flue gas system further includes an air preheater, and the method further includes:

[0021] Before starting the first induced draft fan, start the air preheater.

[0022] According to a second aspect of the embodiments of the present disclosure, there is provided a starting control device for a flue gas system. The flue gas system includes a first induced draft fan and a first forced draft fan. The first induced draft fan includes a first movable blade of the induced draft fan, and the first forced draft fan includes a first movable blade of the forced draft fan. The device includes:

[0023] A first starting module configured to start the first induced draft fan and adjust a first movable blade opening of the first movable blade of the induced draft fan through a first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure. The proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first movable blade opening; and,

[0024] A second starting module configured to start the first forced draft fan and adjust a second movable blade opening of the first forced draft fan to adjust the boiler air volume to a preset target boiler air volume.

[0025] Optionally, the first starting module is further configured to:

[0026] Before adjusting the first movable blade opening of the first movable blade of the induced draft fan through the first proportional-integral control algorithm, adjust the first movable blade opening to a preset first movable blade initial opening value; and / or,

[0027] The second starting module is further configured to adjust the second movable blade opening to a preset second movable blade initial opening value before adjusting the second movable blade opening of the first forced draft fan.

[0028] Optionally, the first starting module is further configured to:

[0029] Determine a target proportional coefficient and a target integral coefficient of the first proportional-integral control algorithm from a plurality of preset proportional coefficients and integral coefficients according to the first movable blade opening;

[0030] Adjust the first movable blade opening through the first proportional-integral control algorithm according to the target furnace negative pressure and the current furnace negative pressure;

[0031] Repeat determining the target proportional coefficient and the target integral coefficient from the plurality of preset proportional coefficients and integral coefficients according to the first movable blade opening to update the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm.

[0032] Optionally, the second starting module is further configured to:

[0033] Increase the second moving vane opening degree according to a preset first opening degree increasing speed until the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to a preset proportional threshold;

[0034] Adjust the second moving vane opening degree by using a second proportional integral control algorithm according to the target boiler air volume and the current boiler air volume.

[0035] Optionally, the air and flue gas system further includes one or more second induced draft fans and one or more second forced draft fans. The second induced draft fan includes a second induced draft fan moving vane, and the second forced draft fan includes a second forced draft fan moving vane. The device further includes:

[0036] A third starting module, configured to start the second induced draft fan, increase the third moving vane opening degree of the second induced draft fan moving vane according to a preset second opening degree increasing speed until a first preset condition is satisfied, and adjust the first moving vane opening degree and the third moving vane opening degree through a first proportional integral control algorithm. The first preset condition includes that the ratio of the third moving vane opening degree to the first moving vane opening degree is within a preset first proportional range, and the ratio of the first current of the first induced draft fan to the second current of the second induced draft fan is within a preset second proportional range;

[0037] A fourth starting module, configured to start the second forced draft fan, increase the fourth moving vane opening degree of the second forced draft fan moving vane according to a preset third opening degree increasing speed until a second preset condition is satisfied, and adjust the second moving vane opening degree and the fourth moving vane opening degree through a second proportional integral control algorithm. The second preset condition includes that the ratio of the fourth moving vane opening degree to the second moving vane opening degree is within a preset third proportional range, and the ratio of the third current of the first forced draft fan to the fourth current of the second forced draft fan is within a preset fourth proportional range.

[0038] Optionally, the air and flue gas system further includes an air preheater. The device further includes a pre-starting module, configured to start the air preheater before starting the first induced draft fan.

[0039] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, including:

[0040] A memory, on which a computer program is stored;

[0041] A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of the embodiments in the first aspect above.

[0042] According to a fourth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method according to the first aspect above are implemented.

[0043] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0044] The present disclosure first starts the first induced draft fan, and adjusts the first vane opening of the first induced draft fan through the first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure. The proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first vane opening. Then, the first forced draft fan is started, and the second vane opening of the first forced draft fan is adjusted to adjust the boiler air volume to a preset target boiler air volume. By adopting the above solution, the automation level of the boiler air and flue gas system startup is improved, the startup of the boiler air and flue gas system is made more stable, the startup process of the boiler air and flue gas system is accelerated, and the reliable and efficient operation of the boiler is ensured.

[0045] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present disclosure.

[0046] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0047] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure, but do not constitute a limitation to the present disclosure.

[0048] Figure 1 is a flowchart of a method for controlling the startup of an air and flue gas system shown according to an exemplary embodiment.

[0049] Figure 2 is a flowchart of another method for controlling the startup of an air and flue gas system shown according to an exemplary embodiment.

[0050] Figure 3 is a flowchart of yet another method for controlling the startup of an air and flue gas system shown according to an exemplary embodiment.

[0051] Figure 4 is a flowchart of yet another method for controlling the startup of an air and flue gas system shown according to an exemplary embodiment.

[0052] Figure 5 is a block diagram of a device for controlling the startup of an air and flue gas system shown according to an exemplary embodiment.

[0053] Figure 6 is a block diagram of another device for controlling the startup of an air and flue gas system shown according to an exemplary embodiment.

[0054] Figure 7It is a block diagram of another starting control device for a wind and smoke system shown according to an exemplary embodiment.

[0055] Figure 8 It is a block diagram of an electronic device shown according to an exemplary embodiment. Detailed implementation manners

[0056] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present disclosure and are not used to limit the present disclosure.

[0057] The present disclosure will be described below in conjunction with specific embodiments.

[0058] Figure 1 It is a flowchart of a starting control method for a wind and smoke system shown according to an exemplary embodiment. As Figure 1 shown, the method may include the following steps:

[0059] In step S101, start the first induced draft fan, and adjust the first blade opening of the first induced draft fan moving blade through the first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure.

[0060] Wherein, the wind and smoke system includes a first induced draft fan and a first forced draft fan. The first induced draft fan includes a first induced draft fan moving blade, and the first forced draft fan includes a first forced draft fan moving blade. The proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first blade opening.

[0061] In the field of thermal power generation, power is usually generated by burning pulverized coal in a coal-fired boiler. The wind and smoke system is used to supply the air required for pulverized coal combustion to the furnace of the boiler, and at the same time disturb the pulverized coal air flow in the furnace to improve the utilization efficiency of pulverized coal.

[0062] In some possible implementation manners, the wind and smoke system may include a first induced draft fan and a first forced draft fan. The function of the induced draft fan is to timely discharge the flue gas generated by pulverized coal combustion from the furnace to maintain the normal operation of the coal-fired boiler. Exemplarily, the induced draft fan may be an adjustable-blade axial-flow fan, and the air volume of the induced draft fan can be adjusted by changing the working angle of the impeller blades through the adjustment system.

[0063] In some embodiments, when starting the first induced draft fan, the specific steps for starting the induced draft fan may include starting the cooling fan of the induced draft fan, starting the lubricating oil pump of the cooling fan, etc. For the specific initial startup steps of the specific induced draft fan, refer to the relevant technology and will not be elaborated here. After starting the first induced draft fan, the first vane opening of the first induced draft fan is adjusted through the first proportional-integral control algorithm. The first vane opening can be a percentage of the maximum working angle of the impeller blades of the first induced draft fan. For example, if the maximum working angle of the impeller blades of the first induced draft fan is 30°, then a first vane opening of 5% indicates that the working angle of the impeller blades of the first induced draft fan is 30°×5% = 1.5°. Specifically, the furnace negative pressure of the boiler can be obtained through an air pressure sensor, and the first vane opening of the first induced draft fan is adjusted through the first proportional-integral control algorithm to adjust the furnace negative pressure of the boiler to a preset target furnace negative pressure (for example, the target furnace negative pressure is -100 Pa).

[0064] It should be particularly noted that since the first induced draft fan is not under load during startup, overshoot and oscillation are likely to occur when adjusting with the first proportional-integral control algorithm. In some embodiments, the proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first vane opening. By way of example, the proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the percentage of the first vane opening and Table 1.

[0065] First moving blade opening Proportionality coefficient Integral coefficient 0％ 0.5 0.5 20％ 0.7 0.7 35％ 1 1 100％ 1 1

[0066] Table 1

[0067] In some embodiments, the following steps can be used to adjust the first vane opening of the first induced draft fan through the first proportional-integral control algorithm.

[0068] Step 1: Determine the target proportional coefficient and target integral coefficient of the first proportional-integral control algorithm from multiple preset proportional coefficients and integral coefficients according to the first vane opening.

[0069] By way of example, the target proportional coefficient and target integral coefficient of the first proportional-integral control algorithm can be determined from Table 1 through linear conversion according to the first vane opening. For example, if the first vane opening is 10%, then the target proportional coefficient of the first proportional-integral control algorithm is determined through linear conversion from Table 1 as The target integral coefficient is

[0070] Step 2: Adjust the first vane opening through the first proportional-integral control algorithm according to the target furnace negative pressure and the current furnace negative pressure.

[0071] In some possible implementation manners, after determining the target proportional coefficient and the target integral coefficient, the opening degree of the first moving vane is adjusted according to the target furnace negative pressure and the current furnace negative pressure through a proportional-integral control algorithm. For the specific steps of the proportional-integral control algorithm adjustment, reference can be made to the description of the proportional-integral control algorithm in the related art, which will not be elaborated here.

[0072] Step 3: Repeatedly determine the target proportional coefficient and the target integral coefficient from multiple preset proportional coefficients and integral coefficients according to the opening degree of the first moving vane, so as to update the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm.

[0073] Exemplarily, the updated target proportional coefficient and the target integral coefficient are determined from the corresponding relationship shown in Table 1 according to the adjusted opening degree of the first moving vane, so as to update the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm.

[0074] By adopting the above solution, the problem of easy overshoot of the conventional proportional-integral control algorithm can be reduced through the first proportional-integral control algorithm with variable coefficients, making the startup process of the air and flue gas system of the coal-fired boiler smoother.

[0075] In step S102, the first forced draft fan is started, and the opening degree of the second moving vane of the first forced draft fan is adjusted to adjust the boiler air volume to a preset target boiler air volume.

[0076] The function of the forced draft fan is to supply the air required for combustion to the furnace. Exemplarily, the forced draft fan can also be an axial flow fan with adjustable moving vanes, and the air volume of the forced draft fan can be adjusted by changing the action angle of the blades through an adjustment system.

[0077] Similar to the induced draft fan, the opening degree of the second moving vane can be the percentage of the maximum working angle of the impeller blades of the first forced draft fan. For example, if the maximum working angle of the impeller blades of the first forced draft fan is 30°, then the opening degree of the second moving vane of 5% indicates that the working angle of the impeller blades of the first forced draft fan is 30° × 5% = 1.5°.

[0078] Specifically, the boiler air volume entering the boiler can be obtained through an air volume sensor, and the opening degree of the second moving vane of the first forced draft fan is adjusted to adjust the boiler air volume of the boiler to a preset target boiler air volume. Exemplarily, the target boiler air volume can be a proportion of the total boiler air volume. For example, if the designed total boiler air volume is 2500 tons per hour and the proportion of the target boiler air volume in the total boiler air volume is 35%, then the target boiler air volume is 875 tons per hour.

[0079] It should be particularly noted that the above target boiler air volume can change with the operation process of the boiler, and the present disclosure places no limitation on this.

[0080] In some embodiments, the following steps can be adopted to adjust the opening degree of the second moving vane of the first forced draft fan.

[0081] Step 1: Increase the second moving vane opening according to a preset first opening increase speed until the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to a preset ratio threshold.

[0082] Exemplarily, the preset first opening increase speed can be 5% per minute. In some possible implementation manners, the second moving vane opening can be gradually increased at this first opening increase speed. As the second moving vane opening of the first forced draft fan gradually increases, the current boiler air volume of the boiler also gradually increases until the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to the preset ratio threshold. For example, this ratio threshold can be 95%. When the second moving vane opening of the first forced draft fan gradually increases, since the air volume entering the boiler furnace increases, the corresponding furnace negative pressure changes, and the first proportional-integral control algorithm will correspondingly control the first moving vane opening of the first induced draft fan to change, so as to adjust the furnace negative pressure of the boiler to a preset target furnace negative pressure.

[0083] Step 2: Adjust the second moving vane opening according to the target boiler air volume and the current boiler air volume by using a second proportional-integral control algorithm.

[0084] When the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to the preset ratio threshold, adjust the second moving vane opening according to the target boiler air volume and the current boiler air volume by using a second proportional-integral control algorithm, so as to adjust the boiler air volume to the preset target boiler air volume.

[0085] By adopting the above solution, the automation level of the boiler air and flue gas system startup is improved, the startup of the boiler air and flue gas system is made smoother, the startup process of the boiler air and flue gas system is accelerated, and the reliable and efficient operation of the boiler is ensured.

[0086] Figure 2 It is a flowchart of another startup control method of the air and flue gas system shown according to an exemplary embodiment. As Figure 2 shown, this method may further include the following steps:

[0087] In step S103, adjust the first moving vane opening to a preset first moving vane initial opening value.

[0088] For the first induced draft fan, when the first moving vane opening is small, the adjustment effect of the first moving vane opening on the furnace negative pressure is not obvious. In order to accelerate the startup process of the boiler air and flue gas system, in some embodiments, the first moving vane opening can be adjusted to the preset first moving vane initial opening value, and then the first induced draft fan is started. Exemplarily, this first moving vane initial opening value can be 5%.

[0089] In step S104, adjust the second moving vane opening to a preset second moving vane initial opening value.

[0090] Similar to the first induced draft fan, in some embodiments, to accelerate the startup process of the boiler flue gas system, the opening of the second moving blade can be adjusted to a preset initial opening value of the second moving blade, and then the first forced draft fan is started. Exemplarily, the initial opening value of the second moving blade can be 5%.

[0091] Adopting the above solution can further accelerate the startup process of the boiler flue gas system and ensure the reliable and efficient operation of the boiler.

[0092] In another embodiment, the flue gas system may further include one or more second induced draft fans and one or more second forced draft fans. The second induced draft fan includes a second induced draft fan moving blade, and the second forced draft fan includes a second forced draft fan moving blade.

[0093] Figure 3 is a flowchart of another method for controlling the startup of a flue gas system shown according to an exemplary embodiment. As Figure 3 shown, the method may further include the following steps:

[0094] In step S105, start the second induced draft fan, increase the opening of the third moving blade of the second induced draft fan according to a preset second opening increase speed until the first preset condition is met, and adjust the opening of the first moving blade and the opening of the third moving blade through the first proportional integral control algorithm.

[0095] Wherein, the first preset condition includes that the ratio of the opening of the third moving blade to the opening of the first moving blade is within a preset first ratio range, and the ratio of the first current of the first induced draft fan to the second current of the second induced draft fan is within a preset second ratio range. For example, the first ratio range can be (0.9 - 1.1), and the second ratio range can be (0.9 - 1.1). The current of the first induced draft fan and the current of the second induced draft fan can respectively represent the power of the first induced draft fan and the power of the second induced draft fan. By combining the ratio of the moving blade openings and the ratio of the currents, the parallel operation of the first induced draft fan and the second induced draft fan can be determined, which can avoid misjudgment in abnormal situations (such as normal moving blade opening but motor stall), and further improve the reliability of startup control.

[0096] Exemplarily, the preset second opening increase speed can be 5% per minute. In some possible implementation manners, the opening of the third moving blade can be gradually increased at this second opening increase speed. As the opening of the third moving blade of the second induced draft fan gradually increases, the furnace negative pressure of the boiler also gradually decreases. The first proportional integral control algorithm will control the opening of the first moving blade to gradually decrease, and the difference between the opening of the first moving blade and the opening of the third moving blade will gradually decrease accordingly. When the first preset condition is met, it indicates the parallel operation of the first induced draft fan and the second induced draft fan, and the opening of the first moving blade and the opening of the third moving blade are adjusted through the first proportional integral control algorithm.

[0097] It should be particularly noted that the number of the second induced draft fans can be one or more, and the present disclosure does not limit this. When the number of the second induced draft fans is more than one, the current of the above-mentioned second induced draft fans can be the average current of multiple induced draft fans.

[0098] In step S106, start the second forced draft fan, increase the fourth vane opening of the second forced draft fan according to a preset third opening increase speed until the second preset condition is met, and adjust the second vane opening and the fourth vane opening through a second proportional-integral control algorithm.

[0099] Among them, the second preset condition includes that the ratio of the fourth vane opening to the second vane opening is within a preset third ratio range, and the ratio of the third current of the first forced draft fan to the fourth current of the second forced draft fan is within a preset fourth ratio range. For example, the third ratio range can be (0.9 - 1.1), and the fourth ratio range can be (0.9 - 1.1). The current of the first forced draft fan and the current of the second forced draft fan can respectively represent the power of the first forced draft fan and the power of the second forced draft fan. By combining the vane opening ratio and the current ratio to determine the parallel operation of the first forced draft fan and the second forced draft fan, misjudgment in abnormal situations (such as normal vane opening but motor stall) can be avoided, and the reliability of start-up control can be further improved.

[0100] Exemplarily, the preset third opening increase speed can be 5% / min. In some possible implementation manners, the fourth vane opening can be gradually increased at this third opening increase speed. As the fourth vane opening of the second forced draft fan gradually increases, the boiler air volume of the boiler also gradually increases. The second proportional-integral control algorithm will control the second vane opening to gradually decrease, and the difference between the second vane opening and the fourth vane opening will gradually decrease accordingly. When the second preset condition is met, it indicates the parallel operation of the first forced draft fan and the second forced draft fan, and the second vane opening and the fourth vane opening are adjusted through the second proportional-integral control algorithm.

[0101] It should be particularly noted that the number of the second forced draft fans can be one or more. The number of the second forced draft fans can be the same as or different from the number of the second induced draft fans. The present disclosure does not limit this. When the number of the second forced draft fans is more than one, the current of the above-mentioned second forced draft fans can be the average current of multiple forced draft fans.

[0102] By adopting the above solutions, the coordinated control and load balancing of multiple induced draft fans and / or multiple forced draft fans can be achieved. In the case where the designed capacity of the boiler is large and multiple induced draft fans and / or multiple forced draft fans are required, or in scenarios such as when the induced draft fans and / or forced draft fans are suspended and restarted, or during fault repair and recovery, multiple induced draft fans and / or multiple forced draft fans can be automatically started, further improving the automation level of the boiler air and flue gas system start-up.

[0103] Figure 4 is a flowchart of another start-up control method for a wind and flue gas system shown according to an exemplary embodiment. As Figure 4 shown, the method may further include the following steps:

[0104] In step S107, start the air preheater.

[0105] Among them, the wind and flue gas system may further include an air preheater. The main function of the air preheater is to collect the heat in the flue gas discharged from the boiler and conduct it to the air before entering the boiler, which can increase the inlet air temperature in the boiler, reduce heat loss, and improve the efficiency of the boiler.

[0106] Before starting the first induced draft fan, the air preheater can be started. For the specific steps of starting the air preheater, reference can be made to the technical description in the related art, which will not be elaborated here.

[0107] Adopting the above solution, the air preheater can be started before starting the first induced draft fan, further improving the automation level of the start-up of the boiler wind and flue gas system.

[0108] Figure 5 is a block diagram of a start-up control device 500 for a wind and flue gas system shown according to an exemplary embodiment. The wind and flue gas system includes a first induced draft fan and a first forced draft fan. The first induced draft fan includes a first induced draft fan moving blade, and the first forced draft fan includes a first forced draft fan moving blade. As Figure 5 shown, the start-up control device 500 of the wind and flue gas system includes:

[0109] A first start-up module 501, configured to start the first induced draft fan, adjust the first moving blade opening of the first induced draft fan moving blade through a first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure, and the proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first moving blade opening; and,

[0110] A second start-up module 502, configured to start the first forced draft fan and adjust the second moving blade opening of the first forced draft fan to adjust the boiler air volume to a preset target boiler air volume.

[0111] Optionally, the first start-up module 501 is further configured to:

[0112] Before adjusting the first moving blade opening of the first induced draft fan moving blade through the first proportional-integral control algorithm, adjust the first moving blade opening to a preset first moving blade initial opening value; and / or,

[0113] Before adjusting the second moving blade opening of the first forced draft fan, adjust the second moving blade opening to a preset second moving blade initial opening value.

[0114] Optionally, the first start-up module 501 is further configured to:

[0115] Determine the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm according to the first moving vane opening degree from multiple preset proportional coefficients and integral coefficients;

[0116] Adjust the first moving vane opening degree through the first proportional-integral control algorithm according to the target furnace negative pressure and the current furnace negative pressure;

[0117] Repeat determining the target proportional coefficient and the target integral coefficient according to the first moving vane opening degree from multiple preset proportional coefficients and integral coefficients to update the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm.

[0118] Optionally, the second starting module 502 is further configured to:

[0119] Increase the second moving vane opening degree according to a preset first opening degree increasing speed until the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to a preset ratio threshold;

[0120] Adjust the second moving vane opening degree by using a second proportional-integral control algorithm according to the target boiler air volume and the current boiler air volume.

[0121] Figure 6 It is a block diagram of a starting control device 500 for another air and flue gas system shown according to an exemplary embodiment. The air and flue gas system further includes one or more second induced draft fans and one or more second forced draft fans. The second induced draft fan includes a second induced draft fan moving vane, and the second forced draft fan includes a second forced draft fan moving vane. As Figure 6 shown, the starting control device 500 of the air and flue gas system further includes:

[0122] A third starting module 503, configured to start the second induced draft fan, increase the third moving vane opening degree of the second induced draft fan moving vane according to a preset second opening degree increasing speed until a first preset condition is met, and adjust the first moving vane opening degree and the third moving vane opening degree through the first proportional-integral control algorithm. The first preset condition includes that the ratio of the third moving vane opening degree to the first moving vane opening degree is within a preset first ratio range, and the ratio of the first current of the first induced draft fan to the second current of the second induced draft fan is within a preset second ratio range;

[0123] A fourth starting module 504, configured to start the second forced draft fan, increase the fourth moving vane opening degree of the second forced draft fan moving vane according to a preset third opening degree increasing speed until a second preset condition is met, and adjust the second moving vane opening degree and the fourth moving vane opening degree through the second proportional-integral control algorithm. The second preset condition includes that the ratio of the fourth moving vane opening degree to the second moving vane opening degree is within a preset third ratio range, and the ratio of the third current of the first forced draft fan to the fourth current of the second forced draft fan is within a preset fourth ratio range.

[0124] Figure 7 It is a block diagram of a start-up control device 500 for another air and flue gas system shown according to an exemplary embodiment. The air and flue gas system further includes an air preheater, such as Figure 7 As shown, the start-up control device 500 of the air and flue gas system further includes:

[0125] A pre-start module 505, configured to start the air preheater.

[0126] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment related to the method, and will not be elaborated here.

[0127] Adopting the above solution can improve the automation level of the start-up of the boiler air and flue gas system, make the start-up of the boiler air and flue gas system more stable, accelerate the start-up process of the boiler air and flue gas system, and ensure the reliable and efficient operation of the boiler.

[0128] Figure 8 It is a block diagram of an electronic device shown according to an exemplary embodiment. Such as Figure 8 As shown, the electronic device 800 may include: a processor 801, a memory 802. The electronic device 800 may further include one or more of a multimedia component 803, an input / output (I / O) interface 804, and a communication component 805.

[0129] Among them, the processor 801 is used to control the overall operation of the electronic device 800 to complete all or part of the steps in the above-mentioned starting control method of the flue gas system. The memory 802 is used to store various types of data to support the operation of the electronic device 800. These data may include, for example, instructions for any application or method operating on the electronic device 800, as well as application-related data, such as contact data, received and sent messages, pictures, audio, video, and so on. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, magnetic disk or optical disc. The multimedia component 803 may include a screen and an audio component. Among them, the screen may be a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone, and the microphone is used to receive external audio signals. The received audio signals may be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The Input / Output (I / O) 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited herein. Therefore, the corresponding communication component 805 may include: a Wi-Fi module, a Bluetooth module, an NFC module, and so on.

[0130] In another exemplary embodiment, a non-transitory computer-readable storage medium including program instructions is further provided. When the program instructions are executed by a processor, the steps of the above-described start control method for the air and flue gas system are implemented. For example, the computer-readable storage medium may be the above-described memory 802 including program instructions, and the above program instructions may be executed by the processor 801 of the electronic device 800 to complete the above-described start control method for the air and flue gas system.

[0131] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0132] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A starting control method for a wind and smoke system, characterized in that, the wind and smoke system includes a first induced draft fan and a first forced draft fan, the first induced draft fan includes a first moving vane of the induced draft fan, and the first forced draft fan includes a first moving vane of the forced draft fan. The method includes: starting the first induced draft fan, and adjusting a first vane opening of the first moving vane of the induced draft fan through a first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure, where the proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the first vane opening; and, starting the first forced draft fan, and adjusting a second vane opening of the first forced draft fan to adjust the boiler air volume to a preset target boiler air volume; the adjusting the second vane opening of the first forced draft fan includes: increasing the second vane opening according to a preset first opening increasing speed until the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to a preset ratio threshold; adjusting the second vane opening according to the target boiler air volume and the current boiler air volume by a second proportional-integral control algorithm; the method further includes: before adjusting the first vane opening of the first moving vane of the induced draft fan through the first proportional-integral control algorithm, adjusting the first vane opening to a preset first vane initial opening value; and / or, before adjusting the second vane opening of the first forced draft fan, adjusting the second vane opening to a preset second vane initial opening value.

2. The method according to claim 1, characterized in that, the adjusting the first vane opening of the first moving vane of the induced draft fan through the first proportional-integral control algorithm includes: determining a target proportional coefficient and a target integral coefficient of the first proportional-integral control algorithm from a plurality of preset proportional coefficients and integral coefficients according to the first vane opening; adjusting the first vane opening through the first proportional-integral control algorithm according to the target furnace negative pressure and the current furnace negative pressure; repeating to determine the target proportional coefficient and the target integral coefficient from the plurality of preset proportional coefficients and integral coefficients according to the first vane opening to update the target proportional coefficient and the target integral coefficient of the first proportional-integral control algorithm.

3. The method according to claim 1, characterized in that, the wind and smoke system further includes one or more second induced draft fans and one or more second forced draft fans. The second induced draft fan includes a second moving vane of the induced draft fan, and the second forced draft fan includes a second moving vane of the forced draft fan. The method further includes: starting the second induced draft fan, increasing a third vane opening of the second moving vane of the induced draft fan according to a preset second opening increasing speed until a first preset condition is satisfied, and adjusting the first vane opening and the third vane opening through a first proportional-integral control algorithm; starting the second forced draft fan, increasing a fourth vane opening of the second moving vane of the forced draft fan according to a preset third opening increasing speed until a second preset condition is satisfied, and adjusting the second vane opening and the fourth vane opening through a second proportional-integral control algorithm.

4. The method according to claim 3, characterized in that, The first preset condition includes that the ratio of the opening degree of the third moving blade to the opening degree of the first moving blade is within a preset first ratio range, and the ratio of the first current of the first induced draft fan to the second current of the second induced draft fan is within a preset second ratio range; the second preset condition includes that the ratio of the opening degree of the fourth moving blade to the opening degree of the second moving blade is within a preset third ratio range, and the ratio of the third current of the first forced draft fan to the fourth current of the second forced draft fan is within a preset fourth ratio range.

5. The method according to any one of claims 1 to 4, wherein, the air and flue gas system further includes an air preheater, and the method further includes: starting the air preheater before starting the first induced draft fan.

6. A starting control device for an air and flue gas system, wherein, the air and flue gas system includes a first induced draft fan and a first forced draft fan, the first induced draft fan includes a first induced draft fan moving blade, the first forced draft fan includes a first forced draft fan moving blade, and the device includes: a first starting module configured to start the first induced draft fan and adjust the opening degree of the first moving blade of the first induced draft fan through a first proportional-integral control algorithm to adjust the furnace negative pressure to a preset target furnace negative pressure, where the proportional coefficient and integral coefficient of the first proportional-integral control algorithm are determined according to the opening degree of the first moving blade; and a second starting module configured to start the first forced draft fan and adjust the opening degree of the second moving blade of the first forced draft fan to adjust the boiler air volume to a preset target boiler air volume; a third starting module configured to start a second induced draft fan and increase the opening degree of the third moving blade of the second induced draft fan according to a preset second opening degree increasing speed until the first preset condition is met; the second starting module is further configured to: increase the opening degree of the second moving blade according to a preset first opening degree increasing speed until the ratio of the current boiler air volume to the target boiler air volume is greater than or equal to a preset ratio threshold; adjust the opening degree of the second moving blade according to the target boiler air volume and the current boiler air volume by using a second proportional-integral control algorithm; the first starting module is further configured to: before adjusting the opening degree of the first moving blade of the first induced draft fan through the first proportional-integral control algorithm, adjust the opening degree of the first moving blade to a preset first moving blade initial opening degree value; and / or the second starting module is further configured to adjust the opening degree of the second moving blade to a preset second moving blade initial opening degree value before adjusting the opening degree of the second moving blade of the first forced draft fan.

7. An electronic device, wherein, it includes: a memory storing a computer program thereon; a processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-5.

8. A non-transitory computer-readable storage medium storing computer program instructions thereon, wherein, when the program instructions are executed by a processor, the steps of the method according to any one of claims 1-5 are implemented.

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