Boiler air distribution system and method

Abstract

The invention relates to the technical field of boiler air distribution. The invention provides a boiler air distribution system and method, and the system comprises combustors which are arranged in multiple layers, and each layer is provided with a plurality of combustors; a plurality of layers of temperature measuring modules are arranged, and each layer is provided with a plurality of temperature measuring modules; each burner is connected with a pulverized coal pipe, and the flow modules are arranged on the pulverized coal pipes; and each pulverized coal pipe is provided with one adjusting module, and the adjusting modules are used for adjusting the pulverized coal flow of the combustor. The temperature in the boiler hearth is obtained through the temperature measuring module, whether flame deflects or not is judged according to the temperature, the pulverized coal flow of each combustor is obtained through the flow module, the pulverized coal flow of the combustors is adjusted through the adjusting module to treat flame deflection, flame wall painting, high-temperature corrosion or unstable combustion and other conditions are avoided, and the service life of the boiler is prolonged. The boiler combustion efficiency is improved, and combustion deterioration and fire extinguishment are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler air distribution, and in particular to a boiler air distribution system and method. Background Art

[0002] The four-corner tangential pulverized coal boiler is prone to flame brushing, high-temperature corrosion, or unstable combustion due to flame deflection or unreasonable design of the primary air nozzle tangential circle. If effective treatment is not carried out, the boiler combustion efficiency will be reduced, the combustion will deteriorate, and even fire will be extinguished. At present, the thermal coal burned in power plants has a low calorific value and a high sulfur content. Under the existing boiler air distribution system, burning inferior coal is prone to fire extinguishing at low load, and high-temperature corrosion is also prone to occur during daily operation. Summary of the invention

[0003] In view of this, the present invention provides a boiler air distribution system and method.

[0004] Specifically, the following technical solutions are included:

[0005] In a first aspect, a boiler air distribution system is provided, comprising:

[0006] A burner, wherein the burner is arranged in multiple layers, and each layer is provided with multiple burners;

[0007] A temperature measuring module, wherein the temperature measuring module is provided in multiple layers, and each layer is provided with multiple temperature measuring modules;

[0008] A flow module, each of the burners is connected to a pulverized coal pipe, and the flow module is arranged on the pulverized coal pipe;

[0009] A regulating module is provided on each of the pulverized coal pipes, and is used to regulate the pulverized coal flow of the burner.

[0010] Preferably, the tangential circle diameters of the multiple burners in the same layer are equal;

[0011] The diameters of the cut circles of the multiple layers of burners decrease layer by layer from bottom to top.

[0012] Preferably, the plurality of temperature measuring modules in the same layer are evenly distributed on the side peripheral wall of the boiler.

[0013] Preferably, a plurality of temperature measuring points are provided on the side circumferential wall of the boiler, and at least two of the temperature measuring modules are provided at each of the temperature measuring points.

[0014] Preferably, the temperature measurement module includes a temperature detection element and a driving structure;

[0015] The driving structure is arranged on the boiler, the driving structure is connected to the temperature detecting member, and the driving structure is used to control the length of the temperature detecting member extending into the furnace of the boiler.

[0016] Preferably, the temperature measurement module further includes a protective cover and a cooling structure;

[0017] The temperature detection component is arranged in the protective cover, the cooling structure is connected to the protective cover, and the cooling structure is used to pass cooling air flow into the protective cover.

[0018] In a second aspect, a boiler air distribution method is provided, using the boiler air distribution system as described in the first aspect, the method comprising:

[0019] Acquire the temperature information fed back by the plurality of temperature measurement modules and the flow information fed back by the plurality of flow modules;

[0020] Based on the preset temperature determination rules, judging whether the flame in the boiler furnace is skewed according to the temperature information fed back by the multiple temperature measurement modules;

[0021] When it is determined that the flame in the boiler furnace is deflected, the pulverized coal flow of the corresponding burner is adjusted by the regulating module according to the flow information fed back by the plurality of flow modules.

[0022] Preferably, judging whether the flame in the boiler furnace is skewed based on the temperature information fed back by the plurality of temperature measuring modules based on the preset temperature judgment rule includes:

[0023] Calculate the average temperature of the target layer according to the temperature information fed back by the multiple temperature measurement modules of the target layer;

[0024] The temperature information fed back by the temperature measuring module of the target layer is compared with the average temperature of the target layer, and whether the flame in the boiler furnace is deflected is determined based on the comparison result and a preset temperature determination rule.

[0025] Preferably, when it is determined that the flame in the furnace of the boiler is deflected, the pulverized coal flow of the corresponding burner is adjusted by the regulating module according to the flow information fed back by the plurality of flow modules, including:

[0026] Determine the layer to be adjusted according to the position where the flame deflects;

[0027] Calculating the average flow of the target layer to be adjusted according to the flow information fed back by the plurality of flow modules of the target layer to be adjusted;

[0028] Compare the flow information fed back by the flow module of the target layer to be adjusted with the average flow of the target layer to be adjusted, and judge whether the burner flow of the target layer to be adjusted is uniform according to the comparison result and the preset flow judgment rule;

[0029] When it is determined that the burner flow of the target layer to be adjusted is uneven, the maximum flow and the minimum flow of the target layer to be adjusted are determined according to the comparison result, and the pulverized coal flow of the burner corresponding to the maximum flow of the target layer to be adjusted is adjusted by the adjustment module corresponding to the maximum flow of the target layer to be adjusted, and the pulverized coal flow of the burner corresponding to the target layer to be adjusted is adjusted by the adjustment module corresponding to the minimum flow of the target layer to be adjusted.

[0030] Preferably, the method further comprises:

[0031] When it is determined that the burner flow of the target layer to be adjusted is uniform, the flame deflection direction in the boiler furnace is determined according to the temperature information fed back by the multiple temperature measuring modules of the target layer to be adjusted;

[0032] According to the flame deflection direction in the boiler furnace, the pulverized coal flow rate of the corresponding burner is adjusted through the adjustment module of the target layer to be adjusted.

[0033] The beneficial effects of the technical solution provided by the present invention include at least:

[0034] The present application obtains the temperature inside the boiler furnace through the temperature measurement module to determine whether the flame is skewed, and obtains the pulverized coal flow rate of each burner through the flow module. The pulverized coal flow rate of the burner is adjusted by the adjustment module to control the flame deviation, avoid flame brushing the wall, high-temperature corrosion, or unstable combustion, etc., improve the boiler combustion efficiency, and avoid combustion deterioration and fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the installation of a burner on a boiler according to an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of a cut circle of a multi-layer burner on a boiler according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the installation of a flow module and a regulating module on a boiler according to an embodiment of the present invention;

[0039] Figure 4 A schematic flow chart of a boiler air distribution method according to an embodiment of the present invention;

[0040] Figure 5 The figure is a schematic diagram of a specific flow chart of a boiler air distribution method according to an embodiment of the present invention.

[0041] The reference numerals in the figures represent respectively:

[0042] 1-burner; 2-temperature measurement module; 3-regulation module; 4-powdered coal pipe; 5-flow module.

[0043] The above drawings have shown a clear embodiment of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Before further describing the embodiments of the present invention in detail, the directional nouns involved in the embodiments of the present invention, such as "upper part", "lower part", "side part", etc., are Figure 1 The directions shown in the figure are for reference only and do not limit the protection scope of the present invention.

[0046] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, the present application provides a boiler air distribution system, including: a burner 1, the burner 1 is arranged in multiple layers, and each layer is provided with multiple burners 1; a temperature measuring module 2, the temperature measuring module 2 is arranged in multiple layers, and each layer is provided with multiple temperature measuring modules 2; a flow module 5, each burner 1 is respectively connected to a pulverized coal pipe 4, and the flow module 5 is arranged on the pulverized coal pipe 4; an adjustment module 3, each pulverized coal pipe 4 is respectively provided with an adjustment module 3, which is used to adjust the pulverized coal flow of the burner 1. The present application obtains the temperature in the furnace of the boiler through the temperature measuring module 2 and judges whether the flame is deflected, and obtains the pulverized coal flow of each burner 1 through the flow module 5, and regulates the pulverized coal flow of the burner 1 through the adjustment module 3 to control the flame deflection, avoid the flame brushing the wall, high temperature corrosion, or unstable combustion, etc., improve the combustion efficiency of the boiler, and avoid combustion deterioration and fire extinguishing.

[0048] Preferably, the burner 1 is arranged at the four corners of the boiler, such as Figure 3As shown, the side wall of the boiler includes corners 1, 2, 3 and 4. Figure 1 As shown, multiple layers of burners 1 are arranged at each corner, and the layers, quantity, and relative height of the burners 1 at the four corners are the same. Figure 1 As shown, six burners 1 are arranged at each corner from bottom to top, and burners 1 are arranged at the same height at four corners. Therefore, six layers of burners 1 are arranged in the boiler, and each layer of burners 1 includes four burners 1 at the same height at four angles, which are correspondingly connected to four pulverized coal pipes 4, and each pulverized coal pipe 4 is correspondingly provided with a flow module 5 and a regulating module 3.

[0049] Furthermore, the tangential circle diameters of multiple burners 1 in the same layer are equal, but the tangential circle diameters of multiple layers of burners 1 decrease layer by layer from bottom to top. Figure 2 As known, the layers of burner 1 from bottom to top are A layer, B layer, C layer, D layer and E layer. For the convenience of understanding, the tangential circles of burner 1 at different angles are selected for illustration. It can be seen that the tangential circle diameter of burner 1 in layer A> the tangential circle diameter of burner 1 in layer B> the tangential circle diameter of burner 1 in layer C> the tangential circle diameter of burner 1 in layer D> the tangential circle diameter of burner 1 in layer E. From bottom to top, the tangential circle diameters of multi-layer burners 1 decrease layer by layer. Thus, the tangential circles of multi-layer burners 1 from bottom to top form a "regular pagoda" shape. The lower burner 1 has a large tangential circle diameter to ensure stable ignition, and the upper burner 1 has a small tangential circle diameter to prevent the corrosion of the water-cooled wall caused by the flame brushing the wall. The tangential circle diameter decreases from bottom to top, which increases the stable combustion ability of the boiler and reduces the risk of the flame brushing the wall in the upper combustion area of ​​the boiler.

[0050] Preferably, multiple temperature measuring modules 2 of the same layer are evenly distributed on the side wall of the boiler. Figure 3 As shown, the boiler includes a front side wall, a rear side wall, a left side wall and a right side wall. Multiple temperature measuring modules 2 on the same layer are evenly distributed on the front side wall, the rear side wall, the left side wall and the right side wall. Multiple temperature measuring modules 2 are evenly distributed on the front side wall, multiple temperature measuring modules 2 are evenly distributed on the rear side wall, multiple temperature measuring modules 2 are evenly distributed on the left side wall, and multiple temperature measuring modules 2 are evenly distributed on the upper right side of the front side of the furnace.

[0051] Further, if Figure 1 As shown, a plurality of temperature measuring points are arranged on the side wall of the boiler, and at least two temperature measuring modules 2 are arranged at each temperature measuring point.

[0052] like Figure 1 As shown, multiple temperature measuring points are evenly distributed on the front side wall of the furnace, multiple temperature measuring points are evenly distributed on the rear side wall of the furnace, multiple temperature measuring points are evenly distributed on the left side wall of the furnace, and multiple temperature measuring points are evenly distributed on the right side wall of the furnace. One temperature measuring point is provided with one temperature measuring module 2 or two temperature measuring modules 2.

[0053] Further, refer to Figure 1As shown, the temperature measuring modules 2 are arranged in multiple layers. The planes where the multiple layers of burners 1 are located and the planes where the multiple layers of temperature measuring modules 2 are located are arranged alternately, and the vertical distance between the planes where the adjacent burners 1 are located and the planes where the temperature measuring modules 2 are located is determined according to the site conditions.

[0054] Furthermore, the temperature measuring module 2 includes a temperature detecting element and a driving structure. The driving structure is arranged on the boiler and connected to the temperature detecting element. The driving structure is used to control the length of the temperature detecting element extending into the boiler furnace.

[0055] Specifically, the temperature detection component is a K-type thermocouple with a measurement range of -200°C to 1260°C. Set multiple temperature measuring modules 2 to measure the temperature simultaneously, and the temperature measurement time of each temperature measuring module 2 is 5 minutes. The data sampling time interval during temperature measurement is set to 10 seconds, and the acquired temperature data is automatically transmitted to the remote control system for storage. During temperature measurement, the temperature detection component extends into the furnace under the drive of the driving structure, protrudes from the water-cooled wall, and detects the temperature in the furnace. After the temperature measurement, the temperature detection component automatically withdraws from the furnace to the water-cooled wall under the drive of the driving structure to ensure that the temperature measuring module 2 is not damaged due to long-term burning.

[0056] Furthermore, the temperature measurement module 2 also includes a protective cover and a cooling structure. The temperature detection element is arranged in the protective cover. The cooling structure is connected to the protective cover, and the cooling structure is used to pass a cooling airflow into the protective cover. The protective cover is a metal reinforced sheath with an outer coating to prevent the high temperature from softening and deforming the thermocouple when the temperature detection element penetrates into the furnace. When measuring the temperature, the temperature detection element is driven into the furnace by the driving structure, and compressed air is not passed through the protective cover to avoid temperature measurement errors, or a small amount of air is passed through the protective cover for cooling to ensure that the temperature measurement module 2 is not damaged due to long-term burning; after the temperature measurement, the temperature detection element automatically withdraws from the furnace to the water-cooled wall under the drive of the driving structure, and compressed air is passed through the protective cover to cool the temperature detection element, and the compressed air passing time is 5 minutes.

[0057] This embodiment also provides a boiler air distribution method, using the boiler air distribution system as described above, such as Figure 4 As shown, the method includes:

[0058] S10: Acquire temperature information fed back by multiple temperature measurement modules 2 and flow information fed back by multiple flow modules 5;

[0059] S20: Based on the preset temperature determination rules, judging whether the flame in the boiler furnace is skewed according to the temperature information fed back by the multiple temperature measurement modules 2;

[0060] S30: When it is determined that the flame in the boiler furnace is deflected, the pulverized coal flow rate of the corresponding burner 1 is adjusted through the adjustment module 3 of the target layer according to the flow information fed back by the multiple flow modules 5.

[0061] The present application obtains the temperature in the boiler furnace through the temperature measurement module 2 to determine whether the flame is deflected, and obtains the coal powder flow rate of each burner 1 through the flow module 5. The coal powder flow rate of the burner 1 is adjusted by the adjustment module 3 to control the flame deviation, avoid flame brushing, high-temperature corrosion, or unstable combustion, etc., improve the boiler combustion efficiency, and avoid combustion deterioration and fire extinguishing.

[0062] Specifically, the temperature information fed back by the multiple temperature measuring modules 2 is classified according to layers, and the position of each temperature measuring module 2 on the side peripheral wall of the boiler is marked.

[0063] Specifically, the flow information fed back by the flow module 5 is marked according to the position of the burner 1 .

[0064] Specifically, the corresponding relationship between the burner 1, the flow module 5 and the regulating module 3 at different positions can be set.

[0065] Specifically, Figure 5 As shown, step S20 specifically includes:

[0066] S21: Calculate the average temperature of the target layer according to the temperature information fed back by the multiple temperature measurement modules 2 of the target layer;

[0067] S22: Compare the temperature information fed back by the temperature measuring module 2 of the target layer with the average temperature of the target layer, and determine whether the flame in the boiler furnace is skewed based on the comparison result and a preset temperature determination rule.

[0068] Specifically, the temperature measuring module 2 is provided with multiple layers, and the target layer is any layer in the multiple layers of the temperature measuring module 2. The multiple layers of the temperature measuring modules 2 can be processed simultaneously, and the multiple layers of the temperature measuring modules 2 respectively judge the flame deflection in the boiler furnace. It can be understood that when the flame in the boiler furnace is judged to be deflected according to the temperature measuring module 2 of the current target layer, the judgment result of the temperature measuring module 2 of the upper layer of the temperature measuring module 2 of the current target layer will also be that the flame in the boiler furnace is deflected.

[0069] Specifically, the preset temperature determination rule includes a preset temperature deviation range. When the deviation between the temperature information fed back by at least two temperature measuring modules 2 of the target layer and the average temperature of the target layer is greater than or equal to the preset temperature deviation range, it is determined that the flame in the boiler furnace is deflected. For example, assuming that the target layer is the third layer, a temperature measuring point is set on the front side wall of the furnace of the third layer, a temperature measuring point is set on the rear side wall of the furnace, a temperature measuring point is set on the left side wall of the furnace, and a temperature measuring point is set on the right side wall of the furnace. Two temperature measuring modules 2 are set at one temperature measuring point. When the temperature information fed back by the multiple temperature measuring modules 2 of the target layer is 700°C and 710°C for the front side wall of the furnace, 800°C and 810°C for the left side wall of the furnace, 820°C and 800°C for the right side wall of the furnace, and 900°C and 910°C for the rear side wall of the furnace, the average temperature of the target layer is 806°C. Assuming that the preset temperature deviation range is 100°C, the difference between the temperature information fed back by the two temperature measuring modules 2 of the target layer and the average temperature of the target layer is greater than 100°C. Therefore, it is determined that the flame in the boiler furnace is deflected. It can be further determined that the position of the flame deflection is the position of the lower burner 1 adjacent to the third layer temperature measurement module 2. It can also be further determined that the direction of the flame deflection is deflected toward the rear side wall of the furnace. The position of the flame deflection and the direction of the flame deflection can be determined and stored at this time, and can be directly retrieved in subsequent steps, or can be determined again in subsequent steps.

[0070] Specifically, in order to further verify whether the flame in the boiler furnace is skewed, the flame in the boiler furnace can be modeled according to the temperature information fed back by multiple temperature measurement modules 2 through simulation software, so as to intuitively determine whether the flame is skewed and determine the flame deflection position and deflection direction.

[0071] It can be understood that the deflection position refers to the position where the flame starts to deflect along the height direction of the boiler, that is, from which layer of the burner 1 from bottom to top, the flame starts to deflect. The deflection direction refers to which side wall of the boiler the flame deflects to. For example, assuming that the target layer is the third layer, a temperature measuring point is set on the front side wall of the furnace, a temperature measuring point is set on the rear side wall of the furnace, a temperature measuring point is set on the left side wall of the furnace, and a temperature measuring point is set on the right side wall of the furnace. Two temperature measuring modules 2 are set at one temperature measuring point. The temperature information fed back by the multiple temperature measuring modules 2 of the target layer are 700℃ and 710℃ for the front side wall of the furnace, 800℃ and 810℃ for the left side wall of the furnace, 820℃ and 800℃ for the right side wall of the furnace, and 800℃ and 800℃ for the rear side wall of the furnace. When the side wall is 900℃ and 910℃, the flame deflection position is the position of the lower burner 1 adjacent to the third layer temperature measurement module 2. Assuming that the number of layers of burner 1 and temperature measurement module 2 is set (from bottom to top): A layer burner 1-first layer temperature measurement module 2-B layer burner 1-second layer temperature measurement module 2-C layer burner 1-third layer temperature measurement module 2-D layer burner 1-fourth layer temperature measurement module 2-E layer burner 1-fifth layer temperature measurement module 2, the flame deflection position is C layer burner 1. The flame deflection direction is deflected toward the rear side wall of the furnace.

[0072] Specifically, in step S30, when it is determined that the flame in the boiler furnace is deflected, the pulverized coal flow of the corresponding burner 1 is adjusted by the adjustment module 3 according to the flow information fed back by the multiple flow modules 5, including:

[0073] S31: Determine the layer to be adjusted according to the position where the flame deflects.

[0074] Specifically, the layer to be adjusted is the burner layer whose height from bottom to top along the height direction of the boiler is greater than or equal to the position where the flame is deflected. For example, if the flame deflection position is burner 1 on layer C, then the layers to be adjusted are burner 1 on layer C, burner 1 on layer D, and burner 1 on layer E. When there are multiple layers to be adjusted, each layer to be adjusted can be adjusted separately and simultaneously.

[0075] S32: Calculate the average flow rate of the target layer to be adjusted according to the flow rate information fed back by the multiple flow rate modules 5 of the target layer to be adjusted.

[0076] Specifically, the target layer to be adjusted is any layer among the layers to be adjusted, that is, burner 1 of the C layer, burner 1 of the D layer, or burner 1 of the E layer.

[0077] S33: Compare the flow information fed back by the flow module 5 of the target layer to be adjusted with the average flow of the target layer to be adjusted, and determine whether the flow of the burner 1 of the target layer to be adjusted is uniform based on the comparison result and a preset flow determination rule.

[0078] Further, the comparison result includes the deviation between the flow information fed back by the flow module 5 of the target layer to be adjusted and the average flow of the target layer to be adjusted, and the deviation can be a ratio of the two or a difference between the two. The pre-set flow determination rule includes a deviation preset value, and the deviation preset value can be a flow ratio or a flow difference. The pre-set flow determination rule also includes when the deviation between the flow information fed back by at least one flow module 5 of the target layer to be adjusted and the average flow of the target layer to be adjusted is greater than or equal to the deviation preset value, it is judged that the flow of the burner 1 of the target layer to be adjusted is uneven; when the deviation between the flow information fed back by all flow modules 5 of the target layer to be adjusted and the average flow of the target layer to be adjusted is less than the deviation preset value, it is judged that the flow of the burner 1 of the target layer to be adjusted is uniform.

[0079] Specifically, in this embodiment, the preset value of the deviation is 10%. When the ratio between the flow information fed back by at least one flow module 5 of the target layer to be adjusted and the average flow of the target layer to be adjusted is greater than or equal to 10%, it is judged that the flow of the burner 1 of the target layer to be adjusted is uneven; when the ratio between the flow information fed back by all flow modules 5 of the target layer to be adjusted and the average flow of the target layer to be adjusted is less than 10%, it is judged that the flow of the burner 1 of the target layer to be adjusted is uniform.

[0080] S34: When it is determined that the flow of the burner 1 of the target layer to be adjusted is uneven, the maximum flow and the minimum flow of the target layer to be adjusted are determined according to the comparison result, and the pulverized coal flow of the corresponding burner 1 is adjusted through the adjustment module 3 corresponding to the maximum flow of the target layer to be adjusted, and the pulverized coal flow of the corresponding burner 1 is adjusted through the adjustment module 3 corresponding to the minimum flow of the target layer to be adjusted.

[0081] Specifically, the target layer to be adjusted includes four traffic modules 5, such as Figure 3 As shown, the side wall of the boiler includes corners 1, 2, 3 and 4. Each corner of the target layer to be adjusted has a burner 1, which is connected to four pulverized coal pipes 4. Each pulverized coal pipe 4 is correspondingly provided with a flow module 5 and a regulating module 3.

[0082] Specifically, the pulverized coal flow rate of the corresponding burner 1 is reduced by the regulating module 3 corresponding to the maximum flow rate of the target layer to be adjusted, and the pulverized coal flow rate of the corresponding burner 1 is increased by the regulating module 3 corresponding to the minimum flow rate of the target layer to be adjusted.

[0083] After step S34 is executed once, step S33 is repeatedly executed again until it is determined that the flow rate of the burner 1 of the target layer to be adjusted is uniform. The adjustment range of the adjustment module 3 is 5% when step S34 is executed once.

[0084] The method in step S30 further includes:

[0085] S35: When it is determined that the flow rate of the burner 1 of the target layer to be adjusted is uniform, the flame deflection direction in the boiler furnace is determined according to the temperature information fed back by the multiple temperature measuring modules 2 of the target layer to be adjusted.

[0086] Specifically, the flame deflection direction can directly call the result obtained in step S22, or can be judged in step S35. For example, when the target layer to be adjusted is the C layer burner 1, the temperature information fed back by the upper temperature measuring module 2 adjacent to the target layer to be adjusted is obtained, that is, the temperature information fed back by the third layer temperature measuring module 2: 700°C and 710°C for the front side wall of the furnace, 800°C and 810°C for the left side wall of the furnace, 820°C and 800°C for the right side wall of the furnace, and 900°C and 910°C for the rear side wall of the furnace, it can be obtained that the flame deflection direction is deflected toward the rear side wall of the furnace.

[0087] S36: According to the flame deflection direction in the boiler furnace, the pulverized coal flow rate of the corresponding burner 1 is adjusted through the adjustment module 3 of the target layer to be adjusted.

[0088] Specifically, if the flame deflection direction is toward the rear side wall of the furnace, the pulverized coal flow of the burner 1 connected to the rear side wall of the furnace will be adjusted to be large through the adjustment module 3 connected to the target layer to be adjusted and the rear side wall of the furnace, and the pulverized coal flow of the burner 1 connected to the front side wall of the furnace will be adjusted to be small through the adjustment module 3 connected to the target layer to be adjusted and the front side wall of the furnace. The adjustment range of the adjustment module 3 is 5%.

[0089] Specifically, after step S36 is executed, step S22 is repeatedly executed again until it is determined that the flame in the boiler furnace is not skewed.

[0090] In the present application, when the flame in the boiler furnace is deviated, the boiler air distribution is adjusted by two parameters, temperature and flow. First, the flow parameter is adjusted, and when the flow is uniform, the temperature parameter is adjusted again. This improves the accuracy of the boiler air distribution adjustment and improves the control efficiency when the flame in the boiler furnace is deviated.

[0091] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0092] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be considered exemplary only.

[0093] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A boiler air distribution system, characterized in that: include: A burner, wherein the burner is arranged in multiple layers, and each layer is provided with multiple burners; A temperature measuring module, wherein the temperature measuring module is provided in multiple layers, and each layer is provided with multiple temperature measuring modules; A flow module, each of the burners is connected to a pulverized coal pipe, and the flow module is arranged on the pulverized coal pipe; A regulating module is provided on each of the pulverized coal pipes, and is used to regulate the pulverized coal flow of the burner.

2. A boiler air distribution system according to claim 1, characterized in that: The tangential circle diameters of the multiple burners in the same layer are equal; The diameters of the cut circles of the multiple layers of burners decrease layer by layer from bottom to top.

3. A boiler air distribution system according to claim 1, characterized in that: The plurality of temperature measuring modules in the same layer are evenly distributed on the side peripheral wall of the boiler.

4. A boiler air distribution system according to claim 1, characterized in that: A plurality of temperature measuring points are arranged on the side peripheral wall of the boiler, and at least two temperature measuring modules are arranged at each of the temperature measuring points.

5. A boiler air distribution system according to claim 1, characterized in that: The temperature measurement module includes a temperature detection component and a driving structure; The driving structure is arranged on the boiler, the driving structure is connected to the temperature detecting member, and the driving structure is used to control the length of the temperature detecting member extending into the furnace of the boiler.

6. A boiler air distribution system according to claim 5, characterized in that: The temperature measurement module also includes a protective cover and a cooling structure; The temperature detection component is arranged in the protective cover, the cooling structure is connected to the protective cover, and the cooling structure is used to pass cooling air flow into the protective cover.

7. A boiler air distribution method, characterized in that: Using the boiler air distribution system as described in claims 1 to 6, the method comprises: Acquire the temperature information fed back by the plurality of temperature measurement modules and the flow information fed back by the plurality of flow modules; Based on the preset temperature determination rules, judging whether the flame in the boiler furnace is skewed according to the temperature information fed back by the multiple temperature measurement modules; When it is determined that the flame in the boiler furnace is deflected, the pulverized coal flow of the corresponding burner is adjusted by the regulating module according to the flow information fed back by the plurality of flow modules.

8. A boiler air distribution method according to claim 7, characterized in that: The method of judging whether the flame in the boiler furnace is skewed based on the preset temperature judgment rule and the temperature information fed back by the plurality of temperature measuring modules comprises: Calculate the average temperature of the target layer according to the temperature information fed back by the multiple temperature measurement modules of the target layer; The temperature information fed back by the temperature measuring module of the target layer is compared with the average temperature of the target layer, and whether the flame in the boiler furnace is deflected is determined based on the comparison result and a preset temperature determination rule.

9. A boiler air distribution method according to claim 7, characterized in that: When it is determined that the flame in the boiler furnace is deflected, the pulverized coal flow of the corresponding burner is adjusted by the adjustment module according to the flow information fed back by the plurality of flow modules, including: Determine the layer to be adjusted according to the position where the flame deflects; Calculating the average flow of the target layer to be adjusted according to the flow information fed back by the plurality of flow modules of the target layer to be adjusted; Compare the flow information fed back by the flow module of the target layer to be adjusted with the average flow of the target layer to be adjusted, and judge whether the burner flow of the target layer to be adjusted is uniform according to the comparison result and the preset flow judgment rule; When it is determined that the burner flow of the target layer to be adjusted is uneven, the maximum flow and the minimum flow of the target layer to be adjusted are determined according to the comparison result, and the pulverized coal flow of the burner corresponding to the maximum flow of the target layer to be adjusted is adjusted by the adjustment module corresponding to the maximum flow of the target layer to be adjusted, and the pulverized coal flow of the burner corresponding to the target layer to be adjusted is adjusted by the adjustment module corresponding to the minimum flow of the target layer to be adjusted.

10. A boiler air distribution method according to claim 9, characterized in that: The method further comprises: When it is determined that the burner flow of the target layer to be adjusted is uniform, the flame deflection direction in the boiler furnace is determined according to the temperature information fed back by the multiple temperature measuring modules of the target layer to be adjusted; According to the flame deflection direction in the boiler furnace, the pulverized coal flow rate of the corresponding burner is adjusted through the adjustment module of the target layer to be adjusted.

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