A method, device, and storage medium for controlling air volume of a waste incinerator

Abstract

The application discloses a kind of waste incinerator air volume control method, device, equipment and storage medium, method includes: according to the demand total air volume of waste incinerator, the air distribution output of primary fan and secondary fan is determined, according to the air distribution output of secondary fan, the opening of front end air door and burnout air door is determined, based on the relative position of four grates, the grate air volume proportioning is determined, and the opening of each grate wall side air door of each grate is determined, under the air distribution output of primary fan and secondary fan, according to the opening of each air door, the opening control is carried out to each air door, to control the air volume of each air door under the monitoring of each air volume measuring device, the air volume of each air door flows. As can be seen, by the opening of primary air to each grate air door Proportioning, waste can be evenly distributed air volume combustion, reduce the hearth coking, and by secondary air to the upper furnace temperature intervention control of waste incinerator, to reduce the generation of nitrogen oxides.

Description

Technical Field

[0001] This application relates to the field of waste incineration technology, and more specifically, to a method, apparatus, equipment and storage medium for controlling the air volume of a waste incinerator. Background Technology

[0002] With the fast pace of life, the amount of household waste generated has also increased. To meet the needs of urban beautification and environmental protection, it is necessary to incinerate this waste. However, due to the rapid accumulation of household waste and the large quantity requiring incineration, many waste incineration units have received incineration quotas. Therefore, while accelerating the incineration process, they have neglected the requirements for flue gas emission control, resulting in emissions exceeding certain standards.

[0003] During waste incineration, boilers often experience coking because the large amount of domestic waste burned in the boiler contains a wide variety of substances, resulting in the formation of large amounts of sulfur, nitrogen, nitrogen oxides, and ash particles after combustion. These substances have a strong coking tendency and seriously affect the safe operation of the boiler.

[0004] How to control the dampers of a waste incinerator to reduce coking on the furnace walls and lower nitrogen oxide emissions during operation is an issue that needs attention. Summary of the Invention

[0005] In view of the above problems, this application is made to provide a method, apparatus, equipment and storage medium for controlling the air volume of a waste incinerator, so as to reduce coking on the furnace walls and reduce nitrogen oxide emissions.

[0006] To achieve the above objectives, the following specific solutions are proposed:

[0007] A method for controlling the air volume of a waste incinerator is applied to the damper control system of the waste incinerator, wherein the waste incinerator further includes two blowers, two main air ducts, twenty air ducts, four grates, and twenty dampers;

[0008] The two fans include a primary fan and a secondary fan;

[0009] The two main air ducts include a primary main air duct and a secondary main air duct;

[0010] The twenty air ducts include sixteen primary air ducts and four secondary air ducts;

[0011] The four grates include a primary grate, a secondary grate, a tertiary grate, and a quaternary grate;

[0012] The twenty air dampers include eight furnace wall side air dampers, eight center side air dampers, two front air dampers, and two burnout air dampers;

[0013] Each damper is equipped with an airflow measurement device;

[0014] The primary air fan is connected to the primary air main pipe, and the secondary air fan is connected to the secondary air main pipe;

[0015] Each primary air duct is connected to the primary air main duct, and each secondary air duct is connected to the secondary air main duct.

[0016] Each grate's air outlet is connected to two furnace wall side air dampers and two center side air dampers;

[0017] Each furnace wall side damper is located in the corresponding primary air duct;

[0018] Each central side damper is located in its corresponding primary air duct;

[0019] Each front-end damper is located in its corresponding secondary air duct;

[0020] Each burnout air damper is located in its corresponding secondary air duct;

[0021] The method includes:

[0022] Based on the total air volume required by the waste incinerator, determine the air distribution output of the primary air fan and the air distribution output of the secondary air fan, so that the air distribution output of the primary air fan is greater than the air distribution output of the secondary air fan.

[0023] Based on the air distribution output of the secondary air fan, determine the opening degree of each front-end damper and the opening degree of each burnout air damper, so that the opening degree of any front-end damper is greater than the opening degree of any burnout air damper.

[0024] Based on the relative positions of the four grates, the grate air volume ratio of the four grates is determined;

[0025] Based on the grate air volume ratio, the opening of the wall-side air damper of each grate and the opening of the center-side air damper of each grate are determined. The opening of the wall-side air damper of each grate is smaller than the opening of the center-side air damper of that grate.

[0026] Under the air distribution output of the primary fan and the secondary fan, the opening of each damper is controlled according to the opening of each damper, so as to control the airflow through each damper under the monitoring of the airflow measurement device of each damper.

[0027] Optionally, the platform height of the first-stage grate is higher than that of the second-stage grate, the platform height of the second-stage grate is higher than that of the third-stage grate, the platform height of the third-stage grate is higher than that of the fourth-stage grate, the furnace wall side of the second-stage grate is close to the first-stage grate, the furnace wall side of the third-stage grate is close to the second-stage grate, and the furnace wall side of the fourth-stage grate is close to the third-stage grate.

[0028] Determining the grate air volume ratio of the four grates based on their relative positions includes:

[0029] Based on the position of the primary grate among the four grates, the grate air volume weight ratio of the primary grate is determined to be 10%.

[0030] Based on the position of the secondary grate among the four grates, the grate air volume weight ratio of the secondary grate is determined to be 35%.

[0031] Based on the position of the third-level grate among the four grates, the grate air volume weight ratio of the third-level grate is determined to be 45%.

[0032] Based on the position of the fourth-level grate among the four grates, the grate air volume weight ratio of the fourth-level grate is determined to be 10%.

[0033] Based on the grate air volume weight ratio of each of the four grates, the grate air volume ratio of the four grates is determined to be 1:3.5:4.5:1.

[0034] Optionally, the calibration process for the airflow measurement device of each damper includes:

[0035] For each damper, determine the target main air duct connected to the duct where the damper is located, and adjust the outlet air pressure of the fan connected to the target main air duct to a preset air pressure value;

[0036] For each damper, other dampers in the duct connected to the target air main are identified, and the damper opening ratio of each of the other dampers is fixed to a standard ratio. Based on the air outlet pressure of the fan connected to the target air main, the measured wind speed of the damper opening at each opening ratio is measured, and the flow rate value displayed by the air volume measuring device at the opening ratio of the damper is recorded.

[0037] Based on the measured wind speed of each damper at various opening ratios and the flow rate value displayed by the air volume measuring device at various opening ratios, calculate the flow rate correction coefficient of the air volume measuring device for that damper.

[0038] The airflow measurement device for each damper is calibrated based on the flow correction coefficient of the airflow measurement device for that damper.

[0039] Optionally, each air header is equipped with an air volume measuring device, and each fan is equipped with a corresponding induced draft fan;

[0040] The calibration process for the airflow measurement device of each main air duct includes:

[0041] For each main air duct, determine the target fan connected to the main air duct and the target induced draft fan corresponding to the target fan;

[0042] At each preset frequency, the output of the target induced draft fan of the air header is adjusted so that the negative pressure value of the furnace of the incinerator is within the preset pressure range.

[0043] Based on the frequency of the target fan of each air header as a preset frequency, and the output of the target induced draft fan of the air header at the preset frequency, the dynamic pressure of the air header at the preset frequency is measured, and the flow rate value of the air volume measuring device of the air header at the preset frequency is recorded.

[0044] Based on the dynamic pressure of each air duct at various preset frequencies and the flow rate value of the air volume measuring device of that air duct at various preset frequencies, calculate the flow rate correction coefficient of the air volume measuring device of that air duct.

[0045] The airflow measurement device for each air duct is calibrated based on the flow correction coefficient of the airflow measurement device for that air duct.

[0046] An air volume control device for a waste incinerator is applied to the damper control system of the waste incinerator. The waste incinerator also includes two blowers, two main air ducts, twenty air pipes, four grates, and twenty dampers.

[0047] The two fans include a primary fan and a secondary fan;

[0048] The two main air ducts include a primary main air duct and a secondary main air duct;

[0049] The twenty air ducts include sixteen primary air ducts and four secondary air ducts;

[0050] The four grates include a primary grate, a secondary grate, a tertiary grate, and a quaternary grate;

[0051] The twenty air dampers include eight furnace wall side air dampers, eight center side air dampers, two front air dampers, and two burnout air dampers;

[0052] Each damper is equipped with an airflow measurement device;

[0053] The primary air fan is connected to the primary air main pipe, and the secondary air fan is connected to the secondary air main pipe;

[0054] Each primary air duct is connected to the primary air main duct, and each secondary air duct is connected to the secondary air main duct.

[0055] Each grate's air outlet is connected to two furnace wall side air dampers and two center side air dampers;

[0056] Each furnace wall side damper is located in the corresponding primary air duct;

[0057] Each central side damper is located in its corresponding primary air duct;

[0058] Each front-end damper is located in its corresponding secondary air duct;

[0059] Each burnout air damper is located in its corresponding secondary air duct;

[0060] The airflow control device includes:

[0061] The fan air distribution determination unit is used to determine the air distribution output of the primary fan and the air distribution output of the secondary fan based on the total air volume required by the waste incinerator, so that the air distribution output of the primary fan is greater than the air distribution output of the secondary fan.

[0062] The secondary air damper opening determination unit is used to determine the opening of each front-end damper and the opening of each burnout air damper based on the air distribution output of the secondary air fan, so that the opening of any front-end damper is greater than the opening of any burnout air damper.

[0063] The grate air volume ratio determination unit is used to determine the grate air volume ratio of the four grates based on their relative positions.

[0064] The grate damper opening determination unit is used to determine the opening of the wall-side damper of each grate and the opening of the center-side damper of each grate according to the grate air volume ratio. The opening of the wall-side damper of each grate is smaller than the opening of the center-side damper of that grate.

[0065] An opening control unit is used to control the opening of each damper according to the opening of each damper under the air distribution output of the primary fan and the air distribution output of the secondary fan, so as to control the air volume flowing through each damper under the monitoring of the air volume measuring device of each damper.

[0066] Optionally, the platform height of the first-stage grate is higher than that of the second-stage grate, the platform height of the second-stage grate is higher than that of the third-stage grate, the platform height of the third-stage grate is higher than that of the fourth-stage grate, the furnace wall side of the second-stage grate is close to the first-stage grate, the furnace wall side of the third-stage grate is close to the second-stage grate, and the furnace wall side of the fourth-stage grate is close to the third-stage grate.

[0067] The grate air volume ratio determination unit includes:

[0068] The first grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the first-level grate as 10% based on the position of the first-level grate among the four grates.

[0069] The second grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the secondary grate as 35% based on the position of the secondary grate among the four grates;

[0070] The third grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the three-stage grate as 45% based on the position of the three-stage grate among the four grates.

[0071] The fourth grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the fourth grate as 10% based on the position of the fourth grate among the four grates.

[0072] The fifth grate air volume ratio determination subunit is used to determine the grate air volume ratio of the four grates as 1:3.5:4.5:1 based on the grate air volume weight ratio of each of the four grates.

[0073] Optionally, the airflow control device may also include:

[0074] The outlet pressure fixing unit is used to determine the target air main pipe connected to the air duct where the air damper is located for each air damper, and adjust the outlet pressure of the fan connected to the target air main pipe to a preset air pressure value.

[0075] The wind speed measuring unit is used to determine other dampers in the duct connected to the target air main duct for each damper, and to measure the wind speed of the damper at each opening ratio based on the outlet pressure of the fan connected to the target air main duct by fixing the opening ratio of each of the other dampers to a standard ratio, and to record the flow rate value displayed by the air volume measuring device of the damper at each opening ratio.

[0076] The first flow correction coefficient calculation unit is used to calculate the flow correction coefficient of the air volume measuring device of each damper based on the measured wind speed of each damper opening at various opening ratios and the flow value displayed by the air volume measuring device of the damper opening at various opening ratios.

[0077] The first calibration unit is used to calibrate the airflow measurement device of each damper based on the flow correction coefficient of the airflow measurement device of each damper.

[0078] Optionally, each air header is equipped with an air volume measuring device, and each fan is equipped with a corresponding induced draft fan;

[0079] The airflow control device also includes:

[0080] The target fan determination unit is used to determine, for each air header, the target fan connected to the air header and the target induced draft fan corresponding to the target fan;

[0081] The induced draft fan output adjustment unit is used to adjust the output of the target induced draft fan in each air header at each preset frequency, so that the negative pressure value of the furnace of the incinerator is within a preset pressure range.

[0082] The duct dynamic pressure measuring unit is used to measure the duct dynamic pressure of each duct at a preset frequency based on the frequency of the target fan of each duct and the output of the target fan of the duct at that preset frequency, and to record the flow rate value of the air volume measuring device of the duct at that preset frequency.

[0083] The second flow correction coefficient calculation unit is used to calculate the flow correction coefficient of the air volume measuring device of the air header based on the dynamic pressure of the air header at various preset frequencies and the flow value of the air volume measuring device of the air header at various preset frequencies.

[0084] The second calibration unit is used to calibrate the airflow measurement device of each air header based on the flow correction coefficient of the airflow measurement device of each air header.

[0085] An airflow control device for a waste incinerator includes a memory and a processor;

[0086] The memory is used to store programs;

[0087] The processor is used to execute the program to implement the various steps of the air volume control method for the waste incinerator as described above.

[0088] A storage medium storing a computer program, which, when executed by a processor, implements the various steps of the airflow control method for a waste incinerator as described above.

[0089] Using the above technical solution, this application determines the air distribution output of the primary air fan and the secondary air fan based on the total air volume required by the waste incinerator, ensuring that the air distribution output of the primary air fan is greater than that of the secondary air fan. Based on the air distribution output of the secondary air fan, the opening degree of each front-end damper and each burnout air damper is determined, ensuring that the opening degree of any front-end damper is greater than the opening degree of any burnout air damper. Based on the relative positions of the four grates, the grate configuration of the four grates is determined. The air volume ratio is determined by setting the opening degree of the wall-side dampers and the center-side damper of each grate according to the grate air volume ratio. The opening degree of the wall-side dampers of each grate is smaller than that of the center-side damper. Furthermore, under the air distribution output of the primary air fan and the secondary air fan, the opening degree of each damper is controlled according to its respective opening degree. Under the monitoring of the air volume measurement device of each damper, the air volume flowing through each damper is controlled. Therefore, by adjusting the opening degree of the dampers of each grate using primary air, the air volume of the waste can be evenly distributed for combustion, reducing coking in the furnace. Furthermore, the secondary air can be used to control the upper furnace temperature of the waste incinerator, thereby reducing the generation of nitrogen oxides. Attached Figure Description

[0090] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0091] Figure 1 A schematic diagram of a topology of a waste incinerator provided in an embodiment of this application;

[0092] Figure 2 A schematic diagram illustrating a process for controlling the air volume of a waste incinerator, provided as an embodiment of this application;

[0093] Figure 3 A schematic diagram of a device for controlling the air volume of a waste incinerator, provided as an embodiment of this application;

[0094] Figure 4 This is a schematic diagram of a device for controlling the air volume of a waste incinerator, provided as an embodiment of this application. Detailed Implementation

[0095] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0096] This application's solution can be implemented based on a terminal with data processing capabilities. This terminal can be the damper control system of a waste incinerator, wherein the topology of the waste incinerator is as follows: Figure 1 As shown, a waste incinerator may include two blowers, two main air ducts, twenty air ducts, four grates, and twenty dampers.

[0097] The two fans may include a primary fan and a secondary fan.

[0098] The two main air ducts include a primary main air duct and a secondary main air duct.

[0099] The twenty air ducts include sixteen primary air ducts and four secondary air ducts.

[0100] The four grates include a first-level grate, a second-level grate, a third-level grate, and a fourth-level grate.

[0101] The twenty air dampers include eight furnace wall side air dampers, eight center side air dampers, two front air dampers, and two burnout air dampers.

[0102] Each damper is equipped with an air volume measuring device.

[0103] The primary air fan is connected to the primary air main pipe, and the secondary air fan is connected to the secondary air main pipe.

[0104] Each primary air duct is connected to the primary air main duct, and each secondary air duct is connected to the secondary air main duct.

[0105] Each grate's air outlet is connected to two wall-side air doors and two center-side air doors, with the two wall-side air doors located at opposite ends of the two center-side air doors.

[0106] It is understandable that when the four air dampers of the grate are arranged in the order of left, left-middle, right-middle, and right, the air dampers on the left and right sides are both furnace wall side air dampers, and the air dampers on the left-middle and right-middle sides are both center side air dampers.

[0107] Each furnace wall side damper is located in its corresponding primary air duct.

[0108] Each central side damper is located in its corresponding primary air duct.

[0109] Each front-end damper is located in its corresponding secondary air duct.

[0110] Each burnout air damper is located in its corresponding secondary air duct.

[0111] The opening degree of each damper can be adjusted between 0% and 100%.

[0112] Next, combined Figure 2 The air volume control method for the waste incinerator described in this application may include the following steps:

[0113] Step S110: Based on the total air volume required by the waste incinerator, determine the air distribution output of the primary air fan and the air distribution output of the secondary air fan, so that the air distribution output of the primary air fan is greater than that of the secondary air fan.

[0114] For example, the ratio of the air output of the primary fan to the air output of the secondary fan is 8:2.

[0115] Understandably, primary air mainly provides the required air volume for the incinerator grate, accounting for the main part of the total required air volume, while secondary air mainly supplements the oxygen required for the combustion of municipal solid waste in the incinerator and controls the temperature of the incineration zone to reduce nitrogen oxide emissions and coking on the furnace walls.

[0116] Step S120: Based on the air distribution output of the secondary air fan, determine the opening degree of each front-end damper and the opening degree of each burnout air damper, so that the opening degree of any front-end damper is greater than the opening degree of any burnout air damper.

[0117] Specifically, the opening degree of the two front air dampers can be the same, and the opening degree of the two burnout air dampers can be the same.

[0118] For example, the ratio of the opening of any front damper to the opening of any burnout damper is 7:3.

[0119] Step S130: Determine the grate air volume ratio of the four grates based on their relative positions.

[0120] It is understandable that when a waste incinerator is working, the grate that performs combustion in the middle position requires a higher air volume than the grate that performs combustion on the sides. Therefore, the air volume of the grate on the sides can be smaller than that of the grate in the middle.

[0121] Step S140: Based on the grate air volume ratio, determine the opening degree of the side air damper on the furnace wall of each grate and the opening degree of the center side air damper on each grate.

[0122] The opening of the side damper on the furnace wall of each grate is smaller than the opening of the center damper on that grate.

[0123] It is understandable that, since the incineration of waste components produces substances that easily adhere to the furnace wall surface and cause coking, the air damper on the side of the grate near the furnace wall in the main combustion zone can be controlled to be 10%-15% lower than the air damper opening in the central combustion zone.

[0124] Step S150: Under the air distribution output of the primary fan and the secondary fan, the opening of each damper is controlled according to the opening of each damper, so as to control the air volume flowing through each damper under the monitoring of the air volume measuring device of each damper.

[0125] Among them, the air volume measuring device can display the air volume flow value in real time. Therefore, the air volume measuring device can monitor the air volume flowing through the damper, thereby obtaining the real-time air volume of each damper.

[0126] The airflow control method for a waste incinerator provided in this embodiment determines the air distribution output of the primary air fan and the secondary air fan based on the total airflow demand of the waste incinerator, ensuring that the air distribution output of the primary air fan is greater than that of the secondary air fan. Based on the air distribution output of the secondary air fan, the opening degree of each front-end damper and each burnout air damper is determined, ensuring that the opening degree of any front-end damper is greater than the opening degree of any burnout air damper. Based on the relative positions of the four grates, the airflow control method for the four grates is determined. The grate air volume ratio is determined, and based on this ratio, the opening degree of the wall-side damper and the center-side damper of each grate are determined. The opening degree of the wall-side damper of each grate is smaller than that of the center-side damper. Furthermore, under the air distribution output of the primary air fan and the secondary air fan, the opening degree of each damper is controlled according to its respective opening degree. Under the monitoring of the air volume measurement device of each damper, the air volume flowing through each damper is controlled. Therefore, by adjusting the opening degree of the dampers of each grate using primary air, the air volume of the waste can be evenly distributed for combustion, reducing coking in the furnace. Furthermore, the secondary air can be used to control the upper furnace temperature of the waste incinerator, thereby reducing the generation of nitrogen oxides.

[0127] In some embodiments of this application, the relative positions of the primary grate, secondary grate, tertiary grate, and quaternary grate mentioned in the above embodiments are described, specifically as follows: Figure 2 As shown, the platform height of the first-level grate can be higher than that of the second-level grate, the platform height of the second-level grate can be higher than that of the third-level grate, and the platform height of the third-level grate can be higher than that of the fourth-level grate. The furnace wall side of the second-level grate is close to that of the first-level grate, the furnace wall side of the third-level grate is close to that of the second-level grate, and the furnace wall side of the fourth-level grate is close to that of the third-level grate, so that the four grates are arranged in a stepped descending manner.

[0128] Based on this, the process of determining the grate air volume ratio of the four grates based on their relative positions in step S130 above will be described. This process may include:

[0129] S1. Based on the position of the first-level grate among the four grates, the grate air volume weight ratio of the first-level grate is determined to be 10%.

[0130] S2. Based on the position of the secondary grate among the four grates, the grate air volume weight ratio of the secondary grate is determined to be 35%.

[0131] S3. Based on the position of the third-level grate among the four grates, the grate air volume weight ratio of the third-level grate is determined to be 45%.

[0132] S4. Based on the position of the fourth grate among the four grates, the grate air volume weight ratio of the fourth grate is determined to be 10%.

[0133] Understandably, since the first and fourth grates are located on the sides and the second and third grates are located in the middle, the grate air volume weight ratio of the second and third grates is higher than that of the other two. Also, since most of the heat is transferred upwards during waste combustion, the heat from the third grate may be transferred to the second grate. Therefore, considering the heat balance between the second and third grates during waste combustion, the grate air volume weight ratio of the second grate can be lower than that of the third grate.

[0134] S5. Based on the grate air volume weight ratio of each of the four grates, determine the grate air volume ratio of the four grates as 1:3.5:4.5:1.

[0135] Based on this, the damper openings of both the wall-side dampers and the center-side dampers of the first-stage grate can be determined between 10% and 25%, such as 10% for the wall-side dampers and 20% for the center-side dampers. For the second-stage grate, the damper openings of both the wall-side dampers and the center-side dampers can be determined between 40% and 55%, such as 40% for the wall-side dampers and 55% for the center-side dampers. For the third-stage grate, the damper openings of both the wall-side dampers and the center-side dampers can be determined between 40% and 75%, such as 55% for the wall-side dampers and 65% for the center-side dampers. The opening of the side dampers on the furnace wall and the center damper of the four-stage grate can be determined between 10% and 25%. For example, the opening of the side damper on the furnace wall of the four-stage grate is 10%, and the opening of the center damper of the four-stage grate is 25%.

[0136] Among them, the opening degree of the two side air dampers on the furnace wall of the same grate can be the same, and the opening degree of the two center side air dampers of the same grate can be the same.

[0137] Considering the need to monitor the flow rate of the dampers using airflow measurement devices, and the potential deviations in airflow across different branches during the operation of the waste incinerator, to ensure more accurate and reliable reliance on these devices as monitoring tools, the airflow measurement devices installed at the dampers need to be calibrated before the waste incinerator begins operation. This ensures the airflow displayed by the devices is correct and reliable. Therefore, in some embodiments of this application, the calibration process for the airflow measurement devices at each damper is described. The calibration process may include:

[0138] S1. For each damper, determine the target air header that the duct where the damper is located is connected to, and adjust the outlet air pressure of the fan connected to the target air header to the preset air pressure value.

[0139] S2. For each damper, identify the other dampers in the duct connected to the target air header, and fix the damper opening ratio of each other damper to a standard ratio. Based on the air outlet pressure of the fan connected to the target air header, measure the measured wind speed of the damper opening at each opening ratio, and record the flow rate value displayed by the air volume measuring device at that opening ratio.

[0140] S3. Based on the measured wind speed of each damper opening at various opening ratios, and the flow rate value displayed by the air volume measuring device at various opening ratios of the damper, calculate the flow rate correction coefficient of the air volume measuring device for that damper.

[0141] Specifically, the flow rate value calculated corresponding to the measured wind speed under each opening ratio can be compared with the flow rate value displayed by the air volume measuring device to determine the deviation value. Based on the average value of the deviation values ​​under various opening ratios, the flow rate correction coefficient of the air volume measuring device can be determined.

[0142] S4. Based on the flow correction coefficient of the air volume measuring device for each damper, calibrate the air volume measuring device for that damper.

[0143] For example, when calibrating the air volume measuring device for eight dampers corresponding to four grates, the outlet pressure of the primary air fan can be adjusted to 880 Pa and kept constant. Prepare to measure the air velocity at one damper (such as the damper on the left side of the furnace wall of the primary grate). At this time, the opening of the remaining fifteen dampers needs to be fixed at 50%, and the dampers whose air velocity is to be measured are set to openings of 25%, 50%, 75%, and 100% respectively. Measure the air velocity at these four openings, calculate the corresponding flow rate, and record the flow rate displayed by the air volume measuring device at each opening. Calculate the average deviation of the four flow rate values ​​to obtain the flow correction coefficient for the air volume measuring device of that damper, and then calibrate the air volume measuring device for that damper.

[0144] For example, when calibrating the airflow measuring devices of two front-end dampers and two burnout dampers, the outlet pressure of the secondary air fan can be adjusted to 880 Pa and kept constant. Prepare to measure the airflow velocity of one damper (e.g., the first burnout damper). At this time, fix the opening of the other three dampers (the second burnout damper, the first front-end damper, and the second front-end damper) at 50%. Set the opening of the damper whose airflow velocity is to be measured to 25%, 50%, 75%, and 100%, respectively. Measure the airflow velocity of the damper at these four openings, calculate the corresponding flow rate, and record the flow rate value displayed by the airflow measuring device at each opening. Calculate the average deviation of the four flow rate values ​​to obtain the flow correction coefficient of the airflow measuring device for that damper, and then calibrate the airflow measuring device for that damper.

[0145] Considering the need to monitor the flow rate of the main air duct using an air volume measuring device, and the potential discrepancies between the primary and secondary air volumes during the operation of the waste incinerator, it is necessary to calibrate the air volume measuring devices installed on the main air ducts before the waste incinerator begins operation to ensure the accuracy and reliability of the air volume displayed by the devices. Therefore, in some embodiments of this application, the calibration process for the air volume measuring devices on each main air duct is described. The calibration process may include:

[0146] S1. For each main air duct, determine the target fan connected to the main air duct and the target induced draft fan corresponding to the target fan.

[0147] Specifically, when the main air duct is a primary air duct, the target fan connected to the main air duct can be identified as the primary air fan, and the target induced draft fan can be the induced draft fan supplied to the primary air fan. When the main air duct is a secondary air duct, the target fan connected to the main air duct can be identified as the secondary air fan, and the target induced draft fan can be the induced draft fan supplied to the secondary air fan.

[0148] S2. For each air header, adjust the output of the target induced draft fan at each preset frequency to ensure that the negative pressure value of the incinerator furnace is within the preset pressure range.

[0149] S3. Based on the frequency of the target fan of each air header as a preset frequency, and the output of the target induced draft fan of the air header at the preset frequency, measure the dynamic pressure of the air header at the preset frequency, and record the flow rate value of the air volume measuring device of the air header at the preset frequency.

[0150] S4. Based on the dynamic pressure of each air duct at various preset frequencies and the flow rate value of the air volume measuring device of the air duct at various preset frequencies, calculate the flow rate correction coefficient of the air volume measuring device of the air duct.

[0151] S5. Based on the flow correction coefficient of the air volume measuring device of each air header, calibrate the air volume measuring device of that air header.

[0152] For example, when it is necessary to calibrate the air volume measuring device of the primary air header, the outlet frequency of the primary air fan can be adjusted to 15Hz, 25Hz and 35Hz respectively. After each outlet frequency adjustment, the output of the induced draft fan of the primary air fan is adjusted to keep the furnace negative pressure within the normal range. The dynamic pressure of the primary air header at each outlet frequency is measured, and the flow rate value of the air volume measuring device of the primary air header at each outlet frequency is recorded. The average value of the deviation of the three flow rate values ​​is calculated to obtain the flow correction coefficient of the air volume measuring device of the primary air header, and the air volume measuring device of the primary air header is calibrated.

[0153] For example, when it is necessary to calibrate the air volume measuring device of the secondary air header, the outlet frequency of the secondary air fan can be adjusted to 15Hz, 25Hz and 35Hz respectively. After each outlet frequency adjustment, the output of the induced draft fan of the secondary air fan is adjusted to keep the furnace negative pressure within the normal range. The dynamic pressure of the secondary air header at each outlet frequency is measured, and the flow rate value of the air volume measuring device of the secondary air header at each outlet frequency is recorded. The average value of the deviation of the three flow rate values ​​is calculated to obtain the flow correction coefficient of the air volume measuring device of the secondary air header, and the air volume measuring device of the secondary air header is calibrated.

[0154] The following describes the apparatus for controlling the air volume of a waste incinerator provided in the embodiments of this application. The apparatus for controlling the air volume of a waste incinerator described below can be referred to in correspondence with the method for controlling the air volume of a waste incinerator described above.

[0155] See Figure 3 , Figure 3This is a schematic diagram of a device for controlling the air volume of a waste incinerator, as disclosed in an embodiment of this application.

[0156] like Figure 3 As shown, the device may include:

[0157] The fan air distribution determination unit 11 is used to determine the air distribution output of the primary fan and the air distribution output of the secondary fan according to the total air volume required by the waste incinerator, so that the air distribution output of the primary fan is greater than the air distribution output of the secondary fan.

[0158] The secondary air damper opening determination unit 12 is used to determine the opening of each front-end damper and the opening of each burnout air damper according to the air distribution output of the secondary air fan, so that the opening of any front-end damper is greater than the opening of any burnout air damper.

[0159] The grate air volume ratio determination unit 13 is used to determine the grate air volume ratio of the four grates based on their relative positions.

[0160] The grate damper opening determination unit 14 is used to determine the opening of the wall-side damper of each grate and the opening of the center-side damper of each grate according to the grate air volume ratio. The opening of the wall-side damper of each grate is smaller than the opening of the center-side damper of that grate.

[0161] The opening control unit 15 is used to control the opening of each damper according to the opening of each damper under the air distribution output of the primary fan and the air distribution output of the secondary fan, so as to control the air volume flowing through each damper under the monitoring of the air volume measuring device of each damper.

[0162] Optionally, the platform height of the first-stage grate is higher than that of the second-stage grate, the platform height of the second-stage grate is higher than that of the third-stage grate, the platform height of the third-stage grate is higher than that of the fourth-stage grate, the furnace wall side of the second-stage grate is close to the first-stage grate, the furnace wall side of the third-stage grate is close to the second-stage grate, and the furnace wall side of the fourth-stage grate is close to the third-stage grate.

[0163] The grate air volume ratio determination unit includes:

[0164] The first grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the first-level grate as 10% based on the position of the first-level grate among the four grates.

[0165] The second grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the secondary grate as 35% based on the position of the secondary grate among the four grates;

[0166] The third grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the three-stage grate as 45% based on the position of the three-stage grate among the four grates.

[0167] The fourth grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the fourth grate as 10% based on the position of the fourth grate among the four grates.

[0168] The fifth grate air volume ratio determination subunit is used to determine the grate air volume ratio of the four grates as 1:3.5:4.5:1 based on the grate air volume weight ratio of each of the four grates.

[0169] Optionally, the airflow control device may also include:

[0170] The outlet pressure fixing unit is used to determine the target air main pipe connected to the air duct where the air damper is located for each air damper, and adjust the outlet pressure of the fan connected to the target air main pipe to a preset air pressure value.

[0171] The wind speed measuring unit is used to determine other dampers in the duct connected to the target air main duct for each damper, and to measure the wind speed of the damper at each opening ratio based on the outlet pressure of the fan connected to the target air main duct by fixing the opening ratio of each of the other dampers to a standard ratio, and to record the flow rate value displayed by the air volume measuring device of the damper at each opening ratio.

[0172] The first flow correction coefficient calculation unit is used to calculate the flow correction coefficient of the air volume measuring device of each damper based on the measured wind speed of each damper opening at various opening ratios and the flow value displayed by the air volume measuring device of the damper opening at various opening ratios.

[0173] The first calibration unit is used to calibrate the airflow measurement device of each damper based on the flow correction coefficient of the airflow measurement device of each damper.

[0174] Optionally, each air header is equipped with an air volume measuring device, and each fan is equipped with a corresponding induced draft fan;

[0175] The airflow control device also includes:

[0176] The target fan determination unit is used to determine, for each air header, the target fan connected to the air header and the target induced draft fan corresponding to the target fan;

[0177] The induced draft fan output adjustment unit is used to adjust the output of the target induced draft fan in each air header at each preset frequency, so that the negative pressure value of the furnace of the incinerator is within a preset pressure range.

[0178] The duct dynamic pressure measuring unit is used to measure the duct dynamic pressure of each duct at a preset frequency based on the frequency of the target fan of each duct and the output of the target fan of the duct at that preset frequency, and to record the flow rate value of the air volume measuring device of the duct at that preset frequency.

[0179] The second flow correction coefficient calculation unit is used to calculate the flow correction coefficient of the air volume measuring device of the air header based on the dynamic pressure of the air header at various preset frequencies and the flow value of the air volume measuring device of the air header at various preset frequencies.

[0180] The second calibration unit is used to calibrate the airflow measurement device of each air header based on the flow correction coefficient of the airflow measurement device of each air header.

[0181] The airflow control device for a waste incinerator provided in this application embodiment can be applied to equipment for airflow control in waste incinerators, such as the damper control system of a waste incinerator. Optionally, Figure 4 The hardware structure block diagram of the air volume control equipment for a waste incinerator is shown. (Refer to...) Figure 4 The hardware structure of the air volume control device for a waste incinerator may include: at least one processor 1, at least one communication interface 2, at least one memory 3, and at least one communication bus 4.

[0182] In this embodiment of the application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4;

[0183] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0184] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0185] The memory stores a program, which the processor can call. The program is used for:

[0186] Based on the total air volume required by the waste incinerator, determine the air distribution output of the primary air fan and the air distribution output of the secondary air fan, so that the air distribution output of the primary air fan is greater than that of the secondary air fan.

[0187] Based on the air distribution output of the secondary air fan, determine the opening degree of each front-end damper and the opening degree of each burnout air damper, so that the opening degree of any front-end damper is greater than the opening degree of any burnout air damper.

[0188] Based on the relative positions of the four grates, the grate air volume ratio of the four grates is determined;

[0189] Based on the grate air volume ratio, the opening of the wall-side air damper of each grate and the opening of the center-side air damper of each grate are determined. The opening of the wall-side air damper of each grate is smaller than the opening of the center-side air damper of that grate.

[0190] Under the air distribution output of the primary fan and the secondary fan, the opening of each damper is controlled according to the opening of each damper, so as to control the airflow through each damper under the monitoring of the airflow measurement device of each damper.

[0191] Optionally, the refined and extended functions of the program can be found in the description above.

[0192] This application embodiment also provides a storage medium that can store a program suitable for execution by a processor, the program being used for:

[0193] Based on the total air volume required by the waste incinerator, determine the air distribution output of the primary air fan and the air distribution output of the secondary air fan, so that the air distribution output of the primary air fan is greater than that of the secondary air fan.

[0194] Based on the air distribution output of the secondary air fan, determine the opening degree of each front-end damper and the opening degree of each burnout air damper, so that the opening degree of any front-end damper is greater than the opening degree of any burnout air damper.

[0195] Based on the relative positions of the four grates, the grate air volume ratio of the four grates is determined;

[0196] Based on the grate air volume ratio, the opening of the wall-side air damper of each grate and the opening of the center-side air damper of each grate are determined. The opening of the wall-side air damper of each grate is smaller than the opening of the center-side air damper of that grate.

[0197] Under the air distribution output of the primary fan and the secondary fan, the opening of each damper is controlled according to the opening of each damper, so as to control the airflow through each damper under the monitoring of the airflow measurement device of each damper.

[0198] Optionally, the refined and extended functions of the program can be found in the description above.

[0199] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0200] 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.

[0201] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the air volume of a waste incinerator, characterized in that, An air damper control system is applied to a waste incinerator, which also includes two blowers, two main air ducts, twenty air ducts, four grates, and twenty air dampers; The two fans include a primary fan and a secondary fan; The two main air ducts include a primary main air duct and a secondary main air duct; The twenty air ducts include sixteen primary air ducts and four secondary air ducts; The four grates include a primary grate, a secondary grate, a tertiary grate, and a quaternary grate; The twenty air dampers include eight furnace wall side air dampers, eight center side air dampers, two front air dampers, and two burnout air dampers; Each damper is equipped with an airflow measurement device; The primary air fan is connected to the primary air main pipe, and the secondary air fan is connected to the secondary air main pipe; Each primary air duct is connected to the primary air main duct, and each secondary air duct is connected to the secondary air main duct. Each grate's air outlet is connected to two furnace wall side air dampers and two center side air dampers; Each furnace wall side damper is located in the corresponding primary air duct; Each central side damper is located in its corresponding primary air duct; Each front-end damper is located in its corresponding secondary air duct; Each burnout air damper is located in its corresponding secondary air duct; The method includes: Based on the total air volume required by the waste incinerator, determine the air distribution output of the primary air fan and the air distribution output of the secondary air fan, so that the air distribution output of the primary air fan is greater than the air distribution output of the secondary air fan. Based on the air distribution output of the secondary air fan, determine the opening of each front-end damper and the opening of each burnout air damper, so that the opening of any front-end damper is greater than the opening of any burnout air damper. Based on the relative positions of the four grates, the grate air volume ratio of the four grates is determined; Based on the grate air volume ratio, the opening of the wall-side air damper of each grate and the opening of the center-side air damper of each grate are determined. The opening of the wall-side air damper of each grate is smaller than the opening of the center-side air damper of that grate. Under the air distribution output of the primary fan and the secondary fan, the opening of each damper is controlled according to the opening of each damper, so as to control the airflow through each damper under the monitoring of the airflow measurement device of each damper.

2. The method according to claim 1, characterized in that, The platform height of the first-stage grate is higher than that of the second-stage grate, the platform height of the second-stage grate is higher than that of the third-stage grate, the platform height of the third-stage grate is higher than that of the fourth-stage grate, the furnace wall side of the second-stage grate is close to the first-stage grate, the furnace wall side of the third-stage grate is close to the second-stage grate, and the furnace wall side of the fourth-stage grate is close to the third-stage grate. Determining the grate air volume ratio of the four grates based on their relative positions includes: Based on the position of the primary grate among the four grates, the grate air volume weight ratio of the primary grate is determined to be 10%. Based on the position of the secondary grate among the four grates, the grate air volume weight ratio of the secondary grate is determined to be 35%. Based on the position of the third-level grate among the four grates, the grate air volume weight ratio of the third-level grate is determined to be 45%. Based on the position of the fourth-level grate among the four grates, the grate air volume weight ratio of the fourth-level grate is determined to be 10%. Based on the grate air volume weight ratio of each of the four grates, the grate air volume ratio of the four grates is determined to be 1:3.5:4.5:

1.

3. The method according to claim 1, characterized in that, The calibration process for the airflow measurement device of each damper includes: For each damper, determine the target main air duct connected to the duct where the damper is located, and adjust the outlet air pressure of the fan connected to the target main air duct to a preset air pressure value; For each damper, other dampers in the duct connected to the target air main are identified, and the damper opening ratio of each of the other dampers is fixed to a standard ratio. Based on the air outlet pressure of the fan connected to the target air main, the measured wind speed of the damper opening at each opening ratio is measured, and the flow rate value displayed by the air volume measuring device at the opening ratio of the damper is recorded. Based on the measured wind speed of each damper at various opening ratios and the flow rate value displayed by the air volume measuring device at various opening ratios, calculate the flow rate correction coefficient of the air volume measuring device for that damper. The airflow measurement device for each damper is calibrated based on the flow correction coefficient of the airflow measurement device for that damper.

4. The method according to claim 1, characterized in that, Each main air duct is equipped with an air volume measuring device, and each fan is equipped with a corresponding induced draft fan; The calibration process for the airflow measurement device of each main air duct includes: For each main air duct, determine the target fan connected to the main air duct and the target induced draft fan corresponding to the target fan; At each preset frequency, the output of the target induced draft fan of the air header is adjusted so that the negative pressure value of the furnace of the incinerator is within the preset pressure range. Based on the frequency of the target fan of each air header as a preset frequency, and the output of the target induced draft fan of the air header at the preset frequency, the dynamic pressure of the air header at the preset frequency is measured, and the flow rate value of the air volume measuring device of the air header at the preset frequency is recorded. Based on the dynamic pressure of each air duct at various preset frequencies and the flow rate value of the air volume measuring device of that air duct at various preset frequencies, calculate the flow rate correction coefficient of the air volume measuring device of that air duct. The airflow measurement device for each air duct is calibrated based on the flow correction coefficient of the airflow measurement device for that air duct.

5. An air volume control device for a waste incinerator, characterized in that, An air damper control system is applied to a waste incinerator, which also includes two blowers, two main air ducts, twenty air ducts, four grates, and twenty air dampers; The two fans include a primary fan and a secondary fan; The two main air ducts include a primary main air duct and a secondary main air duct; The twenty air ducts include sixteen primary air ducts and four secondary air ducts; The four grates include a primary grate, a secondary grate, a tertiary grate, and a quaternary grate; The twenty air dampers include eight furnace wall side air dampers, eight center side air dampers, two front air dampers, and two burnout air dampers; Each damper is equipped with an airflow measurement device; The primary air fan is connected to the primary air main pipe, and the secondary air fan is connected to the secondary air main pipe; Each primary air duct is connected to the primary air main duct, and each secondary air duct is connected to the secondary air main duct. Each grate's air outlet is connected to two furnace wall side air dampers and two center side air dampers; Each furnace wall side damper is located in the corresponding primary air duct; Each central side damper is located in its corresponding primary air duct; Each front-end damper is located in its corresponding secondary air duct; Each burnout air damper is located in its corresponding secondary air duct; The airflow control device includes: The fan air distribution determination unit is used to determine the air distribution output of the primary fan and the air distribution output of the secondary fan based on the total air volume required by the waste incinerator, so that the air distribution output of the primary fan is greater than the air distribution output of the secondary fan. The secondary air damper opening determination unit is used to determine the opening of each front-end damper and the opening of each burnout air damper based on the air distribution output of the secondary air fan, so that the opening of any front-end damper is greater than the opening of any burnout air damper. The grate air volume ratio determination unit is used to determine the grate air volume ratio of the four grates based on their relative positions. The grate damper opening determination unit is used to determine the opening of the wall-side damper of each grate and the opening of the center-side damper of each grate according to the grate air volume ratio. The opening of the wall-side damper of each grate is smaller than the opening of the center-side damper of that grate. An opening control unit is used to control the opening of each damper according to the opening of each damper under the air distribution output of the primary fan and the air distribution output of the secondary fan, so as to control the air volume flowing through each damper under the monitoring of the air volume measuring device of each damper.

6. The air volume control device according to claim 5, characterized in that, The platform height of the first-stage grate is higher than that of the second-stage grate, the platform height of the second-stage grate is higher than that of the third-stage grate, the platform height of the third-stage grate is higher than that of the fourth-stage grate, the furnace wall side of the second-stage grate is close to the first-stage grate, the furnace wall side of the third-stage grate is close to the second-stage grate, and the furnace wall side of the fourth-stage grate is close to the third-stage grate. The grate air volume ratio determination unit includes: The first grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the first-level grate as 10% based on the position of the first-level grate among the four grates. The second grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the secondary grate as 35% based on the position of the secondary grate among the four grates; The third grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the three-stage grate as 45% based on the position of the three-stage grate among the four grates. The fourth grate air volume ratio determination subunit is used to determine the grate air volume weight ratio of the fourth grate as 10% based on the position of the fourth grate among the four grates. The fifth grate air volume ratio determination subunit is used to determine the grate air volume ratio of the four grates as 1:3.5:4.5:1 based on the grate air volume weight ratio of each of the four grates.

7. The air volume control device according to claim 5, characterized in that, Also includes: The outlet pressure fixing unit is used to determine the target air main pipe connected to the air duct where the air damper is located for each air damper, and adjust the outlet pressure of the fan connected to the target air main pipe to a preset air pressure value. The wind speed measuring unit is used to determine other dampers in the duct connected to the target air main duct for each damper, and to measure the wind speed of the damper at each opening ratio based on the outlet pressure of the fan connected to the target air main duct by fixing the opening ratio of each of the other dampers to a standard ratio, and to record the flow rate value displayed by the air volume measuring device of the damper at each opening ratio. The first flow correction coefficient calculation unit is used to calculate the flow correction coefficient of the air volume measuring device of each damper based on the measured wind speed of each damper opening at various opening ratios and the flow value displayed by the air volume measuring device of the damper opening at various opening ratios. The first calibration unit is used to calibrate the airflow measurement device of each damper based on the flow correction coefficient of the airflow measurement device of each damper.

8. The air volume control device according to claim 5, characterized in that, Each main air duct is equipped with an air volume measuring device, and each fan is equipped with a corresponding induced draft fan; The airflow control device also includes: The target fan determination unit is used to determine, for each air header, the target fan connected to the air header and the target induced draft fan corresponding to the target fan; The induced draft fan output adjustment unit is used to adjust the output of the target induced draft fan in each air header at each preset frequency, so that the negative pressure value of the furnace of the incinerator is within a preset pressure range. The duct dynamic pressure measuring unit is used to measure the duct dynamic pressure of each duct at a preset frequency based on the frequency of the target fan of each duct and the output of the target fan of the duct at that preset frequency, and to record the flow rate value of the air volume measuring device of the duct at that preset frequency. The second flow correction coefficient calculation unit is used to calculate the flow correction coefficient of the air volume measuring device of the air header based on the dynamic pressure of the air header at various preset frequencies and the flow value of the air volume measuring device of the air header at various preset frequencies. The second calibration unit is used to calibrate the airflow measurement device of each air header based on the flow correction coefficient of the airflow measurement device of each air header.

9. An air volume control device for a waste incinerator, characterized in that, Including memory and processor; The memory is used to store programs; The processor is used to execute the program to implement the various steps of the air volume control method for a waste incinerator as described in any one of claims 1-4.

10. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the various steps of the air volume control method for a waste incinerator as described in any one of claims 1-4.

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