A cold air dynamic field test device in a boiler

Abstract

The utility model relates to air power field test technical field discloses a kind of boiler inner cold air power field test device, it includes stand and ribbon assembly, the bottom of stand is provided with base, stand is provided with multiple ribbon assembly along vertical direction, multiple ribbon assembly is movably connected in stand along vertical direction, and the horizontal distance of ribbon assembly distance the stand is adjustable.Cold air power field test can be carried out to boiler, the position of stand can be adjusted to be close to boiler preferentially, then the height of each ribbon assembly and the distance of each ribbon assembly distance stand are adjusted to make each layer combustion space center near all correspond to be provided with ribbon, the floating form of ribbon is observed, and the detection verification of cold air power field in boiler can be realized. That is, the utility model can simply and efficiently carry out cold air power field test to multilayer combustion space of different model boilers simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of aerodynamic field testing technology, and more specifically, to a cold-state aerodynamic field testing device inside a boiler. Background Technology

[0002] The stability of a boiler during operation depends on the aerodynamic conditions of the burner and furnace, specifically the movement of air and fuel. Poor conditions can lead to combustion flame deviation and boiler coking. To determine the quality of the aerodynamic field within the furnace, gas flow pattern testing is typically required. However, it is difficult to test the internal gas while the boiler is running. A simplified alternative is to conduct an aerodynamic field test with ventilation in a cold furnace state, i.e., a cold-state aerodynamic field test. This test allows for a direct inspection of the airflow distribution within the furnace, enabling timely analysis and identification of any problems with the boiler's aerodynamic field conditions, thereby contributing to improved equipment efficiency and stability.

[0003] Existing tangential combustion boilers typically have different numbers of layers, each with a combustion center. Current methods for simulating boiler combustion using cold-state aerodynamic field testing usually involve randomly selecting a single layer and conducting ribbon tests sequentially. However, these tests fail to adequately account for the influence of the aerodynamic fields in other layers, making it difficult to fully reflect the actual combustion conditions in each primary air layer. This results in unstable combustion, coking, and rapid wear of water-cooled walls in certain locations even after boiler startup under a combination of multiple aerodynamic fields, severely impacting the safe and stable operation of the boiler. Even systems capable of detecting multiple aerodynamic fields present technical challenges, such as inconvenience in use, operational difficulties, and incompatibility with different boiler models and numbers of layers. Utility Model Content

[0004] To overcome the technical problem in existing technologies of the difficulty in simultaneously conducting multi-layer boiler internal cold air field tests on different models of four-corner tangential combustion boilers with multi-layer combustion spaces in a simple and efficient manner, this utility model provides a boiler internal cold aerodynamic field test device, which includes:

[0005] A column, the bottom of which is provided with a base;

[0006] A ribbon assembly is provided on the column in a vertical direction. Each ribbon assembly includes a ribbon. The multiple ribbon assemblies are movably connected to the column in a vertical direction, and the horizontal distance between the ribbon and the column is adjustable.

[0007] Furthermore, the ribbon assembly is provided with a telescopic rod, one end of which is connected to the column, and the other end is provided with a ribbon.

[0008] Furthermore, the ribbon assembly includes a connector, the connector including a groove, and the connector being slidably connected to the column via the groove.

[0009] Furthermore, the column is rotatably connected to the base.

[0010] Furthermore, the connector is an elastic member, and the groove is formed at the end of the connector near the column.

[0011] Furthermore, the column is provided with anti-slip strips extending in the vertical direction, and the anti-slip strips can abut against the groove wall of the groove.

[0012] Furthermore, in each of the ribbon components, the ribbon is a cross-shaped ribbon, and the telescopic rod is provided with a vibration sensor corresponding to the cross-shaped ribbon. The vibration sensor is communicatively connected to a light-emitting component.

[0013] Furthermore, the column is a telescopic column.

[0014] Furthermore, the retractable column includes a fixed column, a sliding column, and a fixing member. The sliding column is slidably connected to the fixed column. The fixed column is provided with a first adjustment hole arranged in a vertical direction. The sliding column is provided with at least one second adjustment hole. The fixing member can pass through the first adjustment hole and the second adjustment hole to fix the fixed column and the sliding column.

[0015] Beneficial effects:

[0016] This application provides a cold aerodynamic field testing device for boilers, comprising columns and ribbon assemblies. A base is provided at the bottom of the columns, and multiple ribbon assemblies are vertically mounted on each column. These ribbon assemblies are movably connected to the columns in the vertical direction, and the horizontal distance between the ribbon assemblies and the columns is adjustable. When conducting cold aerodynamic field tests on a boiler, the column position can be adjusted first to be closer to the boiler. Then, the height of each ribbon assembly and the distance between each ribbon assembly and the column are adjusted so that a ribbon is correspondingly positioned at the center of each combustion space. Observing the fluttering pattern of the ribbons allows for the detection and verification of the cold aerodynamic field. In short, by simply and efficiently adjusting the positions of the columns and ribbon assemblies, cold aerodynamic field tests can be conducted simultaneously on multiple combustion spaces of different boiler models. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a side view of the boiler internal cold aerodynamic field test device provided by this utility model;

[0019] Figure 2 This is a schematic diagram of the rear structure of the boiler internal cold aerodynamic field test device provided by this utility model;

[0020] Figure 3 This is a schematic diagram of the ribbon assembly structure of the boiler internal cold aerodynamic field test device provided by this utility model;

[0021] Figure 4 This is a schematic diagram of the working scenario of the ribbon in the boiler internal cold aerodynamic field test device provided by this utility model.

[0022] In the diagram: 1. Column; 11. Fixed column; 111. First adjustment hole; 12. Sliding column; 121. Anti-slip strip; 122. Second adjustment hole; 2. Base; 3. Ribbon assembly; 31. Connector; 311. Slide groove; 32. Telescopic rod; 33. Vibration sensor; 34. Cross-shaped ribbon; 35. Light-emitting component. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] like Figures 1-4 As shown, this embodiment provides a cold aerodynamic field testing device for a boiler, comprising a column 1 and ribbon assemblies 3. A base 2 is provided at the bottom of the column 1. Multiple ribbon assemblies 3 are vertically arranged on the column 1, and are movably connected to the column 1. The horizontal distance between the ribbons and the column 1 is adjustable. When conducting a cold aerodynamic field test on the boiler, the position of the column 1 can be adjusted first to be closer to the boiler. Then, the height of each ribbon assembly 3 and the distance of each ribbon assembly 3 from the column 1 are adjusted so that a ribbon is correspondingly placed at the center of each combustion space. Observing the fluttering pattern of the ribbons allows for the detection and verification of the cold aerodynamic field. In other words, by simply and efficiently adjusting the positions of the column 1 and the ribbon assemblies 3, cold aerodynamic field tests can be conducted simultaneously on multiple combustion spaces of different boiler models.

[0025] Specifically, taking a tangentially circular combustion boiler with five combustion spaces as an example, the aforementioned cold-state aerodynamic field test device for the boiler can first place the column 1 with the base 2 around the boiler. After the column 1 is set up, the height of each set of ribbon components 3 can be adjusted according to the height of each layer of the boiler, so that ribbon components 3 are set at the height position of each combustion space. Then, the horizontal distance between the ribbon components 3 and the column 1 is adjusted so that each ribbon is located at the center of each combustion space. At this time, the movement state of the ribbon can reflect the air outlet status of each layer of dampers and the working condition of the cold-state aerodynamic field inside the boiler. It can be understood that setting ribbons in each air layer at the same time can better simulate and find out whether the combustion center of each layer is in the same vertical line. In view of the problem of deviation of the primary air combustion center in single or multiple layers, the secondary air can be adjusted to make the combustion center more consistent with the furnace center. The proportional relationship of air distribution can be found by the opening of the secondary air at each corner, providing a basis for subsequent boiler air distribution adjustment, ensuring the optimal combustion state of the boiler, and reducing the problems of boiler coke shedding and water-cooled wall wear.

[0026] Specifically, in this embodiment, the ribbon assembly 3 is equipped with a telescopic rod 32, one end of which is connected to the column 1, and the other end is equipped with a ribbon. When the telescopic rod 32 extends or retracts, it can move the ribbon closer to or away from the column 1, thereby controlling the horizontal distance between the ribbon and the column 1. It can be understood that if the preset combustion center of the boiler is located on the same vertical line, then the horizontal distance of each ribbon from the column 1 should be equal so that they are simultaneously near the combustion center of the boiler. The user can adjust the position of each ribbon on the same vertical line by adjusting the number of telescopic sections of the telescopic rod 32. In some other embodiments, the horizontal distance of the ribbon can also be adjusted in other ways, such as using a folding rod, with both ends of the folding rod connected to the ribbon assembly 3 and the column respectively; or each ribbon assembly 3 is located at the end of a horizontal bar that passes through the column, and the horizontal bar slides to move the ribbon. No further limitations are made here.

[0027] Furthermore, the ribbon assembly 3 includes a connector 31, which includes a groove 311 that is slidably connected to the column 1. That is, the ribbon assembly 3 can adjust its height by sliding, which is quick and convenient. In some other embodiments, a hook can be provided at the end of the connector 31, which is detachably connected to the column 1; or the connector 31 and the column 1 can be magnetically connected, but this embodiment does not limit this. In some other embodiments, a groove 311 can be provided on the column 1, and a slider can be provided on the connector 31, with the slider extending into the groove 311 to achieve a sliding connection between the column 1 and the ribbon assembly 3.

[0028] Furthermore, the column 1 and the base 2 are rotatably connected. Given that the boiler combustion center is located on the same vertical line, the rotation of the column 1 itself can drive multiple ribbon assemblies 3 to rotate together, thus ensuring that the ribbons extend in the same direction. When the ribbon extension angle and extension distance are the same, it can be guaranteed that all ribbons are located on the same vertical line.

[0029] Furthermore, the connector 31 is an elastic element, and a groove 311 is formed at the end of the connector 31 near the column 1. The elastic element's own contraction performance ensures that the connector 31 remains relatively fixed to the column 1 without external force interference, thus preventing the ribbon assembly 3 from sliding and affecting the test results.

[0030] Furthermore, the column 1 is provided with an anti-slip strip 121 extending vertically, which can abut against the groove wall of the slide 311. When the height of the ribbon assembly 3 is manually adjusted, the abutment between the anti-slip strip 121 and the groove wall ensures that the ribbon assembly only moves up and down, preventing relative rotation between the connector 31 and the column 1, and thus preventing deviation in the extension direction of the ribbon.

[0031] Specifically, in each ribbon assembly 3, the ribbon is a cross-shaped ribbon 34. A vibration sensor 33 is installed on the telescopic rod 32 corresponding to the cross-shaped ribbon 34. The vibration sensor 33 is communicatively connected to a light-emitting component 35. The four-corner tangential combustion boiler arranges burners at the four corners to form a rotating flame, thus generating a rotating dynamic field. Therefore, the cross-shaped ribbon 34 is provided. When the cross-shaped ribbon 34 is subjected to rotating airflow, its branches will disperse, and the shape of the ribbon can roughly reflect the gas flow pattern. It is understood that the wind force at the center of rotation is weaker. If the center of the cross-shaped ribbon 34 is located at the center of rotation, the vibration generated when the ribbon disperses is smaller. If the center of the cross-shaped ribbon 34 is deviated from the center of rotation, the vibration generated when the ribbon disperses is larger. Therefore, the vibration sensor 33 can send a corresponding signal to the light-emitting component 35 when the ribbon vibrates strongly. The operator can determine whether the ribbon is located at the center of the rotating airflow of that layer based on whether the light-emitting component 35 emits light, avoiding errors caused by visual observation. It is understood that the vibration frequency and amplitude required for the vibration sensor 33 to trigger the signal can be manually adjusted. The connection between the vibration sensor 33 and the light-emitting component 35 can be a wire connection or an electromagnetic wave connection; this embodiment does not limit this. When a dynamic field deviation problem is determined to occur in a certain layer, the secondary air opening of that layer can be adjusted to make the center of the dynamic field coincide with the preset combustion center. Figure 4 The diagram shown is a top view of the cross-shaped ribbon 34 located at the center of the airflow.

[0032] In some other embodiments, instead of using the vibration sensor 33 to determine whether the cross-shaped ribbon 34 is located at the center of the power field, the cross-shaped ribbon 34 is connected to the end of the telescopic rod 32 by a thin rope. The rotating airflow generated when each damper is opened will cause the cross-shaped ribbon 34 to move horizontally and bring the center of the cross-shaped ribbon 34 to the actual center of the power field. The operator can determine the center of the power field based on the location of the center of the cross-shaped ribbon 34.

[0033] Specifically, column 1 is a telescopic column 1. When column 1 extends or retracts, it can drive the ribbon assembly 3 to move up and down, thereby giving the ribbon assembly 3 a larger range of vertical movement, thus adapting to boilers of different heights.

[0034] Furthermore, the retractable column 1 includes a fixed column 11 and a sliding column 12. The sliding column 12 is slidably connected to the fixed column 11. The fixed column 11 is provided with a first adjustment hole 111 arranged vertically, and the sliding column 12 is provided with a second adjustment hole 122 corresponding to the first adjustment hole 111. The fixed column 11 is directly connected to the base 2, and the sliding column 12 is slidably connected to the fixed column 11. The ribbon assembly 3 is initially set on the sliding column 12. The sliding column 12 can drive the ribbon assembly 3 to move when it rises or falls. When the sliding column 12 reaches a certain height, a fixing piece can be inserted into both the first adjustment hole 111 and the second adjustment hole 122 to fix the sliding column 12 to the fixed column 11. Furthermore, the first adjustment hole 111 is a threaded hole, and the second adjustment hole 122 is a through hole, so the fixed column 11 and the sliding column 12 can be fixed to each other using bolts. Meanwhile, since the connector 31 is an elastic element, it can be removed from the sliding post 12 and connected to the fixed post 11, further expanding the vertical range of motion of the ribbon assembly 3.

[0035] Specifically, in this embodiment, the boiler has primary air nozzles and secondary air nozzles. By using the above-mentioned cold aerodynamic field test device inside the boiler, a cross-shaped ribbon is set at the center of the four furnace walls at the elevation of the primary air nozzle position. The primary air fan is started to simulate boiler operation, and the deviation between the shape of the primary air nozzle ribbon at each layer and the center of the furnace is observed.

[0036] Taking a boiler with five combustion chambers as an example, the power field control can be carried out according to the following steps during the test:

[0037] S1. First, calibrate the center and level of the burner nozzle, and check the working status of the primary and secondary air dampers to avoid interference caused by equipment damage.

[0038] S2. After the fan starts, measure each primary wind speed and correct any deviations. Adjust the primary wind speed by adjusting the adjustable lock hole to eliminate interference for subsequent ribbon tests and narrow down the scope of investigation for flame center deviation.

[0039] S3. Simulate the ribbon flow under seven operating conditions: all primary and secondary air of five coal mills (12345) are fully open; all primary air of five coal mills (12345) is operating normally; primary air of coal mills (1234) is operating normally; primary air of coal mills (1235) is operating normally; primary air of coal mills (1345) is operating normally; primary air of coal mills (1245) is operating normally; primary air of coal mills (2345) is operating normally; primary air of coal mills (2345) is operating normally. Summarize the problems existing in each layer after the ribbon flow test and their deviation from the preset center position.

[0040] S4. Based on the deviation of the aerodynamic field center, adjust the opening of the adjacent secondary air to make the center of the ribbon more consistent with the center of the furnace. The operator records the opening of the secondary air dampers at the four corners of the combustion space of this layer, and adjusts them according to this ratio in subsequent operation.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test device for cold-state aerodynamic field inside a boiler, characterized in that, include: A column (1) is provided with a base (2) at its bottom. The ribbon assembly (3) is provided on the column (1) in a vertical direction. The ribbon assembly (3) includes a ribbon. The multiple ribbon assemblies (3) are movably connected to the column (1) in a vertical direction, and the horizontal distance between the ribbon and the column (1) is adjustable.

2. The boiler internal cold aerodynamic field test device according to claim 1, characterized in that, The ribbon assembly (3) is provided with a telescopic rod (32), one end of which is connected to the column (1), and the other end is provided with the ribbon.

3. The boiler internal cold aerodynamic field test device according to claim 2, characterized in that, The ribbon assembly (3) includes a connector (31) with a groove (311) on it, and the connector (31) is slidably connected to the column (1) through the groove (311).

4. The boiler internal cold aerodynamic field test device according to claim 3, characterized in that, The column (1) is rotatably connected to the base (2).

5. The boiler internal cold aerodynamic field test device according to claim 4, characterized in that, The connector (31) is an elastic member, and the groove (311) is opened at the end of the connector (31) near the column (1).

6. The boiler internal cold aerodynamic field test device according to claim 5, characterized in that, The column (1) is provided with anti-slip strips (121) extending in the vertical direction, and the anti-slip strips (121) can abut against the groove wall of the groove (311).

7. The boiler internal cold aerodynamic field test device according to claim 2, characterized in that, In each of the ribbon components (3), the ribbon is a cross-shaped ribbon (34), and the cross-shaped ribbon (34) is installed at the position of the telescopic rod (32) and is equipped with a vibration sensor (33). The vibration sensor (33) is communicatively connected to a light-emitting component (35).

8. The boiler internal cold aerodynamic field test apparatus according to any one of claims 1-7, characterized in that, The column (1) is a telescopic column (1).

9. The boiler internal cold aerodynamic field test device according to claim 8, characterized in that, The retractable column (1) includes a fixed column (11), a sliding column (12), and a fixing member. The sliding column (12) is slidably connected to the fixed column (11). The fixed column (11) is provided with a first adjustment hole (111) arranged in the vertical direction. The sliding column (12) is provided with at least one second adjustment hole (122). The fixing member can pass through the first adjustment hole (111) and the second adjustment hole (122) to fix the fixed column (11) and the sliding column (12).

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