Boiler wall air regulation system and regulation method

Abstract

The present invention discloses a boiler wall wind regulation system and a boiler wall wind regulation method based on the boiler wall wind regulation system. The boiler wall wind regulation system includes a detection system and a purge system. The detection system includes a plurality of detection probes and a detection device. The plurality of detection probes are suitable for being arranged on the inner side of the boiler water-cooled wall and have a set spacing with the water-cooled wall. The plurality of detection probes are evenly spaced and distributed along the water-cooled wall. The plurality of detection probes are connected to the detection device. The detection device is suitable for continuously and dynamically detecting the gas composition inside the water-cooled wall. The purge system includes a nozzle and an air supply component. The air supply component is connected to the nozzle. The nozzle is suitable for spraying primary air to the water-cooled wall. The wind direction and air volume of the nozzle jet are adjustable. The boiler wall wind regulation system and the regulation method of the embodiment of the present invention have the advantage of being able to solve the problem of high temperature corrosion of the water-cooled wall in the main burner area.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler equipment, and in particular to a boiler wall wind regulation system and a boiler wall wind regulation method based on the boiler wall wind regulation system. Background Art

[0002] With the continuous improvement of the control requirements for nitrogen oxide emissions from domestic coal-fired boilers, most coal-fired boilers have adopted low-nitrogen combustion technology with deep air classification to achieve low NOx emissions. Under low-nitrogen combustion conditions in the main burner area, the oxygen content near the side wall water-cooled wall is very low and the CO concentration is very high, presenting an overall reducing atmosphere. At the same time, there is a large amount of corrosive gas in this area (mainly H2S gas under the reducing atmosphere), causing serious high-temperature corrosion of the water-cooled wall in the main burner area, causing the water-cooled wall tube wall to corrode and thin rapidly and even burst, seriously affecting the safety of boiler operation. The boiler in the related technology has the problem of high-temperature corrosion of the water-cooled wall in the main burner area during combustion. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a boiler wall wind adjustment system, which has the advantage of being able to solve the problem of high temperature corrosion of the water-cooled wall in the main burner area.

[0004] The embodiment of the present invention further provides a boiler wall wind regulation method based on the above boiler wall wind regulation system.

[0005] The boiler wall wind regulation system of the embodiment of the present invention includes a detection system, the detection system includes multiple detection probes and detection equipment, the multiple detection probes are suitable for being arranged on the inner side of the boiler water-cooled wall and have a set distance from the water-cooled wall, and the multiple detection probes are evenly spaced along the water-cooled wall, the multiple detection probes are connected to the detection equipment to continuously transport the air on the inner side of the water-cooled wall to the detection equipment, and the detection equipment is suitable for continuously and dynamically detecting the gas composition on the inner side of the water-cooled wall; a purge system, the purge system includes a nozzle and an air supply assembly, the air supply assembly is connected to the nozzle, the air supply assembly is suitable for guiding the primary air in the boiler to the nozzle, the nozzle is suitable for spraying the primary air to the water-cooled wall, and the wind direction and air volume of the nozzle jet are adjustable to purge the primary air to the area of ​​reducing atmosphere on the surface of the water-cooled wall.

[0006] The boiler wall wind regulation system and the boiler wall wind regulation method according to the embodiments of the present invention have the advantage of being able to solve the problem of high temperature corrosion of the water-cooled wall in the main burner area.

[0007] In some embodiments, the detection component further includes a sampling component, wherein the sampling component is connected to the plurality of detection probes, and the sampling component is also connected to the detection device to transport the gas of any one of the plurality of detection probes to the detection device.

[0008] In some embodiments, the detection probe includes a temperature measuring component, a pressure measuring component and a gas guiding component. The temperature measuring component is suitable for measuring the temperature of the gas in a set area on the water-cooled wall surface, the pressure measuring component is suitable for measuring the gas pressure in a set area on the water-cooled wall surface, and the gas guiding component is suitable for guiding the gas in the set area on the water-cooled wall surface to the sampling component.

[0009] In some embodiments, the nozzle is a cylindrical structure, and a plurality of guide vanes are provided at the end of the nozzle. The guide vanes can be synchronously swung along the height direction of the nozzle so that the primary wind blown out by the nozzle can sweep the water-cooled wall.

[0010] In some embodiments, the end of the nozzle includes a reducing section and an expanding section, the inner diameter of the reducing section gradually decreases along the direction of the airflow in the nozzle, and the inner diameter of the expanding section gradually decreases and increases along the direction of the airflow in the nozzle, the expanding section is located downstream of the reducing section along the direction of the airflow in the nozzle, and the expanding section is located at the downstream end of the nozzle along the direction of the airflow in the nozzle.

[0011] In some embodiments, a plurality of the guide blades are located in the expanded diameter section, and the plurality of the guide blades can swing synchronously to adjust the spray direction of the upper nozzle;

[0012] The plurality of guide blades can swing in opposite directions so that the distance between any two guide blades gradually decreases along the airflow direction in the nozzle, thereby reducing the flow area at the end of the nozzle to improve the jet intensity of the nozzle.

[0013] In some embodiments, there are a plurality of the nozzles, and the plurality of nozzles are evenly spaced apart along a width direction of the nozzle.

[0014] The boiler wall wind regulation method of the embodiment of the present invention is based on the boiler wall wind regulation system described in any of the above embodiments, and the boiler wall wind regulation method comprises the following steps:

[0015] The distribution of reducing atmosphere on the water wall surface is continuously acquired through the detection system;

[0016] The direction and volume of the primary air sprayed by the nozzle are determined according to the distance between the nozzle and the area with high reducing atmosphere on the water-cooled wall surface and the concentration of reducing gas in the area;

[0017] Open the nozzle to blow primary air to the area with high reducing atmosphere on the water-cooled wall surface until the detection system detects that the concentration of reducing gas in this area is lower than the set threshold.

[0018] In some embodiments, continuously obtaining the distribution of the reducing atmosphere on the surface of the water-cooled wall through the detection system includes the following steps:

[0019] The reducing gas concentration at multiple points on the water wall surface is obtained through multiple detection probes;

[0020] According to the reducing gas concentration at multiple points on the water-cooled wall surface, the continuous distribution of the reducing gas concentration at various locations on the water-cooled wall surface is calculated by interpolation.

[0021] In some embodiments, the boiler wall wind regulation method further includes the following steps:

[0022] The air volume of the wall-attached wind on the surface of the water-cooled wall is detected by multiple detection probes;

[0023] According to the air volume of the wall-adhering wind on the water-cooled wall surface, the area with a smaller air volume of the wall-adhering wind on the water-cooled wall surface is obtained;

[0024] Adjust the direction of the airflow from the nozzle and spray the primary air to the area on the water-cooled wall surface where the air volume of the wall wind is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a boiler wall wind regulation system according to an embodiment of the present invention.

[0026] Figure 2 It is a schematic structural diagram of a nozzle of a boiler wall wind regulating system according to an embodiment of the present invention.

[0027] Figure 3 It is a front view schematic diagram of a nozzle of a boiler wall wind regulating system according to an embodiment of the present invention.

[0028] Figure 4 yes Figure 3 The first cross-sectional view at AA in the middle

[0029] Figure 5 yes Figure 3 A second cross-sectional view at AA in the figure.

[0030] Reference numerals:

[0031] Detection system 1; detection probe 11; detection equipment 12; sampling component 13;

[0032] Purge system 2; nozzle 21; guide vane 211; diameter expansion section 212; diameter reduction section 213; air supply assembly 22. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] Combine the following Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A boiler wall wind adjustment system according to an embodiment of the present invention is described.

[0035] The boiler wall wind regulation system according to the embodiment of the present invention comprises a detection system 1 and a purge system 2 .

[0036] The detection system 1 includes a plurality of detection probes 11 and a detection device 12. The plurality of detection probes 11 are suitable for being arranged on the inner side of the boiler water-cooled wall and have a set distance from the water-cooled wall. The plurality of detection probes 11 are evenly spaced along the water-cooled wall. The plurality of detection probes 11 are connected to the detection device 12 to continuously transport the air inside the water-cooled wall to the detection device 12. The detection device 12 is suitable for continuously and dynamically detecting the gas composition inside the water-cooled wall.

[0037] Specifically, multiple detection probes 11 are arranged in the furnace cavity of the main burner of the coal-fired boiler and are located on the side of the water-cooled wall of the main burner facing the furnace cavity. The multiple detection probes 11 have the same set interval with the water-cooled wall, and the multiple detection probes 11 are evenly spaced in a plane parallel to the water-cooled wall.

[0038] In some embodiments, the multiple detection probes 11 include multiple rows of detection probes 11, and the multiple rows of detection probes 11 are evenly spaced along the width direction of the water-cooled wall. Each row of detection probes 11 includes multiple detection probes 11, and the multiple detection probes 11 in a single row of detection probes 11 are evenly spaced along the length direction of the water-cooled wall, so that the multiple detection probes 11 are evenly distributed in a plane parallel to the water-cooled wall.

[0039] The detection device 12 is a gas composition analyzer. The detection probe 11 transmits the gas in the furnace chamber to the detection device 12. The detection device 12 performs a composition analysis on the sample gas sent by the detection probe 11 to detect the concentration of reducing gases such as H2S around the corresponding detection probe 11, thereby obtaining a reducing atmosphere at the corresponding detection probe 11.

[0040] Multiple detection probes 11 are connected to the detection device 12. During the operation of the boiler, the multiple detection probes 11 sequentially transmit the sampled gas to the detection device 12 for component analysis, thereby continuously and dynamically analyzing the distribution of the reducing atmosphere on the water-cooled wall surface.

[0041] The purge system 2 includes a nozzle 21 and an air supply assembly 22. The air supply assembly 22 is connected to the nozzle 21. The air supply assembly 22 is suitable for guiding the primary air in the boiler to the nozzle 21. The nozzle 21 is suitable for spraying the primary air to the water-cooled wall. The wind direction and air volume of the nozzle 21 are adjustable to blow the primary air to the area of ​​reducing atmosphere on the surface of the water-cooled wall.

[0042] Specifically, the nozzle 21 is arranged in the furnace cavity, and blows the primary air of the coal-fired boiler to the surface of the water-cooled wall of the main burner to remove the reducing gas on the surface of the water-cooled wall and reduce the high-temperature corrosion of the water-cooled wall. The spray direction of the nozzle 21 is adjustable so that the primary air can be blown to any position of the water-cooled wall. According to the distribution of the reducing atmosphere on the surface of the water-cooled wall obtained by the detection device 12, the primary air is blown to the area with higher reducing atmosphere on the surface of the water-cooled wall to improve the efficiency of the blow.

[0043] With the continuous improvement of the control requirements for nitrogen oxide emissions from domestic coal-fired boilers, most coal-fired boilers have adopted low-nitrogen combustion technology with deep air staging to achieve low NOx emissions. Under low-nitrogen combustion conditions in the main burner area of ​​the boiler, the oxygen content near the wall of the side wall water-cooled wall is very low and the CO concentration is very high, presenting an overall reducing atmosphere. At the same time, there is a large amount of corrosive gas in this area (mainly H2S gas under the reducing atmosphere), resulting in severe high-temperature corrosion of the water-cooled wall in the main burner area, causing the water-cooled wall tube wall to corrode and thin rapidly and even burst, seriously affecting the safety of boiler operation.

[0044] In the related art, the active prevention and control methods for high-temperature corrosion of the water-cooled wall in the main burner area of ​​the counter-firing boiler are mainly based on the wall-attached wind system, generally using rectangular or circular high-speed direct current wind nozzles, and the wind source usually uses a primary air source, which is more ideal.

[0045] Since the nozzle type in the relevant technology is basically fixed and cannot be swung up and down at a large angle, the sweeping range of the high-speed jet cannot be adjusted up and down, or the change in the type of coal burned in the boiler causes the change in the primary fan output margin, resulting in insufficient air volume in the installed wall-mounted air nozzles.

[0046] The boiler wall wind regulation system of the embodiment of the present invention obtains the distribution of the reducing atmosphere on the surface of the water-cooled wall in the main burner of the coal-fired boiler when the coal-fired boiler is working through the detection probe 11 and the detection device 12, and sprays the primary air of the coal-fired boiler to the area with a higher concentration of reducing gas on the surface of the water-cooled wall through the adjustable nozzle 21, so as to perform targeted purging operations on the water-cooled wall.

[0047] On the one hand, purging the area with a higher reducing gas concentration on the water-cooled wall surface can improve the efficiency of reducing the reducing gas concentration on the water-cooled wall surface, improve the protection effect on the water-cooled wall, and reduce the high-temperature corrosion on the water-cooled wall surface. On the other hand, the nozzle 21 performs a targeted purging operation on the water-cooled wall, and only blows the primary air to the area with a higher reducing gas concentration, thereby reducing the demand for primary air by the purge system 2, thereby improving the stability of the boiler wall wind regulation system of the embodiment of the present invention on the water-cooled wall purge, so that the boiler wall wind regulation system of the embodiment of the present invention has the advantage of being able to solve the problem of high-temperature corrosion of the water-cooled wall in the main burner area.

[0048] In some embodiments, the detection component further includes a sampling component 13 , which is connected to the plurality of detection probes 11 , and the sampling component 13 is also connected to the detection device 12 to transport the gas of any one of the plurality of detection probes 11 to the detection device 12 .

[0049] Specifically, multiple detection probes 11 are connected to the sampling assembly 13 to transfer the gas in the main burner furnace chamber to the sampling assembly 13. The sampling assembly 13 converts the gas sent by the multiple detection probes 11 into gas samples through cooling and other operations. Since the detection equipment 12 can only perform gas composition analysis on a single gas sample, the sampling assembly 13 sequentially sends the gas samples obtained by the multiple detection probes 11 to the detection equipment 12 for gas composition analysis, so that the detection system 1 can continuously and dynamically detect the distribution of reducing atmosphere at multiple positions on the surface of the water-cooled wall in the main burner furnace chamber.

[0050] In some embodiments, the detection device 12 is electrically connected to the air supply assembly 22 so as to control the plurality of nozzles 21 through the air supply assembly 22 according to the distribution of the reducing atmosphere on the surface of the water-cooled wall obtained by the detection device 12 .

[0051] In some embodiments, the detection probe 11 includes a temperature measuring component (not shown in the figure), a pressure measuring component (not shown in the figure) and a gas guiding component (not shown in the figure). The temperature measuring component is suitable for measuring the temperature of the gas in a set area on the water-cooled wall surface, the pressure measuring component is suitable for measuring the air pressure in a set area on the water-cooled wall surface, and the gas guiding component is suitable for guiding the gas in the set area on the water-cooled wall surface to the sampling component 13.

[0052] In some embodiments, the nozzle 21 is a cylindrical structure, and a plurality of guide vanes 211 are provided at the end of the nozzle 21. The guide vanes 211 can be synchronously swung along the height direction of the nozzle 21 so that the primary air blown out by the nozzle 21 can sweep the water-cooled wall.

[0053] like Figures 2 to 5 As shown, a plurality of guide blades 211 are arranged at the front end of the nozzle 21, and the primary air flows from the back to the front and is ejected from the front end of the nozzle 21. The guide blades 211 can be arranged along Figure 4The nozzle 21 is swung in the direction a so that the spraying direction of the nozzle 21 can be adjusted in the up and down direction, so that the primary air flow sprayed by the nozzle 21 is blown to the area with higher reducing atmosphere on the surface of the water-cooled wall.

[0054] The end of the nozzle 21 includes a reduced diameter section 213 and an expanded diameter section 212. The inner diameter of the reduced diameter section 213 gradually decreases along the direction of the airflow in the nozzle 21, and the inner diameter of the expanded diameter section 212 gradually decreases and increases along the direction of the airflow in the nozzle 21. The expanded diameter section 212 is located downstream of the reduced diameter section 213 along the direction of the airflow in the nozzle 21, and the expanded diameter section 212 is located at the downstream end of the nozzle 21 along the direction of the airflow in the nozzle 21.

[0055] When the primary air flow in the nozzle 21 flows in the nozzle 21, the flow area of ​​the air flow first decreases and then increases. In the process of reducing the flow area of ​​the air flow, the flow rate of the air flow increases. When the air flow passes through the expansion section 212, the flow area of ​​the air flow increases, which further increases the flow rate of the air flow, thereby improving the efficiency of the nozzle 21 in spraying the primary air flow.

[0056] A plurality of guide vanes 211 are located in the expanded diameter section 212. Figure 4 As shown, the plurality of guide blades 211 can swing synchronously to adjust the spray direction of the upper nozzle 21;

[0057] like Figure 5 As shown, the plurality of guide blades 211 can swing in opposite directions so that the distance between any two guide blades 211 gradually decreases along the airflow direction in the nozzle 21 , thereby reducing the flow area at the end of the nozzle 21 to increase the jet intensity of the nozzle 21 .

[0058] Specifically, when the nozzle 21 is close to the area with high reducing atmosphere on the water-cooled wall surface, Figure 4 As shown, the plurality of guide vanes 211 swing in the same direction to maintain a mutually parallel state, so as to increase the flow rate of the primary air when it is ejected from the nozzle 21. When the nozzle 21 is far away from the area with a high reducing atmosphere on the surface of the water-cooled wall, as shown in FIG. Figure 5 As shown, multiple guide blades 211 swing in opposite directions. When the airflow passes through the multiple guide blades 211, the flow area of ​​the airflow is reduced to increase the flow rate of the airflow flowing out from between the multiple guide blades 211, so that when the primary airflow reaches an area far away from the nozzle 21, the airflow still has sufficient strength to disturb the reducing gas on the surface of the water-cooled wall.

[0059] In some embodiments, there are multiple nozzles 21 , and the multiple nozzles 21 are evenly spaced apart along the width direction of the nozzle 21 .

[0060] Specifically, the multiple detection probes 11 include multiple rows of detection probes 11, and the multiple rows of detection probes 11 are evenly spaced along the width direction of the water-cooled wall. Each row of detection probes 11 includes multiple detection probes 11, and the multiple detection probes 11 in a single row of detection probes 11 are evenly spaced along the length direction of the water-cooled wall, so that the multiple detection probes 11 are evenly distributed in a plane parallel to the water-cooled wall.

[0061] Multiple nozzles 21 are arranged in one-to-one correspondence with multiple rows of detection probes 11, so that a single nozzle 21 can purge the position of any one of the corresponding single-row detection probes 11, so that the purge range of multiple nozzles 21 can completely cover the surface of the water-cooled wall, and dead corners that cannot be purged appear on the surface, thereby reducing the high-temperature corrosion phenomenon on the surface of the water-cooled wall.

[0062] The boiler wall wind regulation method of the embodiment of the present invention is based on the boiler wall wind regulation system in any of the above embodiments, and the boiler wall wind regulation method includes the following steps:

[0063] The distribution of the reducing atmosphere on the surface of the water-cooled wall is continuously obtained through the detection system 1;

[0064] The wind direction and air volume of the primary air sprayed by the nozzle 21 are determined according to the distance between the nozzle 21 and the area with high reducing atmosphere on the water-cooled wall surface and the concentration of reducing gas in the area;

[0065] The nozzle 21 is opened to blow primary air toward the area with high reducing atmosphere of the gas on the water-cooled wall surface until the detection system 1 detects that the concentration of reducing gas in the area is lower than the set threshold.

[0066] In some embodiments, continuously obtaining the distribution of the reducing atmosphere on the surface of the water-cooled wall by the detection system 1 includes the following steps:

[0067] The reducing gas concentration at multiple points on the water wall surface is obtained by multiple detection probes 11;

[0068] According to the reducing gas concentration at multiple points on the water-cooled wall surface, the continuous distribution of the reducing gas concentration at various locations on the water-cooled wall surface is calculated by interpolation.

[0069] In some embodiments, the boiler wall wind regulation method further comprises the following steps:

[0070] The air volume of the wall-attached wind on the surface of the water-cooled wall is detected by a plurality of detection probes 11;

[0071] According to the air volume of the wall-adhering wind on the water-cooled wall surface, the area with a smaller air volume of the wall-adhering wind on the water-cooled wall surface is obtained;

[0072] The direction of the airflow ejected from the nozzle 21 is adjusted so that the primary air is sprayed toward the area on the water-cooled wall surface where the air volume of the wall-attached air is small.

[0073] Specifically, the boiler wall wind regulation method of the embodiment of the present invention obtains the distribution of the reducing atmosphere on the surface of the water-cooled wall in the main burner of the coal-fired boiler when the coal-fired boiler is working through the detection probe 11 and the detection equipment 12, and sprays the primary air of the coal-fired boiler to the area with a higher concentration of reducing gas on the surface of the water-cooled wall through the adjustable nozzle 21, so as to perform targeted purging operations on the water-cooled wall.

[0074] Therefore, on the one hand, purging the area with a higher reducing gas concentration on the water-cooled wall surface can improve the efficiency of reducing the reducing gas concentration on the water-cooled wall surface, improve the protection effect on the water-cooled wall, and reduce the high-temperature corrosion on the water-cooled wall surface. On the other hand, the nozzle 21 performs a targeted purging operation on the water-cooled wall, and only blows the primary air to the area with a higher reducing gas concentration, thereby reducing the demand for primary air by the purge system 2, thereby improving the stability of the boiler wall wind regulation system of the embodiment of the present invention on the water-cooled wall purge, so that the boiler wall wind regulation method of the embodiment of the present invention has the advantage of being able to solve the problem of high-temperature corrosion of the water-cooled wall in the main burner area.

[0075] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0079] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0080] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A boiler wall wind adjustment system, characterized in that: include: A detection system, the detection system comprising a plurality of detection probes and a detection device, the plurality of detection probes being suitable for being arranged on the inner side of a boiler water-cooled wall and having a set spacing with the water-cooled wall, and the plurality of detection probes being evenly spaced and distributed along the water-cooled wall, the plurality of detection probes being connected to the detection device to continuously transport the air inside the water-cooled wall to the detection device, and the detection device being suitable for continuously and dynamically detecting the gas composition inside the water-cooled wall; A purge system, the purge system comprising a nozzle and an air supply assembly, the air supply assembly being connected to the nozzle, the air supply assembly being adapted to guide the primary air in the boiler to the nozzle, the nozzle being adapted to spray the primary air to the water-cooled wall, the wind direction and air volume of the nozzle jet being adjustable to purge the primary air to the reducing atmosphere area on the surface of the water-cooled wall; The nozzle is a cylindrical structure, and a plurality of guide blades are provided at the end of the nozzle; The end of the nozzle comprises a reduced diameter section and an expanded diameter section, the inner diameter of the reduced diameter section gradually decreases along the airflow direction in the nozzle, the inner diameter of the expanded diameter section gradually decreases along the airflow direction in the nozzle, the expanded diameter section is located downstream of the reduced diameter section along the airflow direction in the nozzle, and the expanded diameter section is located at the downstream end of the nozzle along the airflow direction in the nozzle; A plurality of guide blades are located in the expanded diameter section, and the plurality of guide blades can swing synchronously to adjust the spray direction of the nozzle; The plurality of guide blades can swing in opposite directions so that the distance between any two guide blades gradually decreases along the airflow direction in the nozzle, thereby reducing the flow area at the end of the nozzle to improve the jet intensity of the nozzle.

2. The boiler wall wind adjustment system according to claim 1, characterized in that: The detection system further comprises a sampling assembly, wherein the sampling assembly is connected to the plurality of detection probes, and the sampling assembly is also connected to the detection device to transport the gas of any one of the plurality of detection probes to the detection device.

3. The boiler wall wind adjustment system according to claim 2, characterized in that: The detection probe includes a temperature measuring component, a pressure measuring component and a gas guiding component. The temperature measuring component is suitable for measuring the temperature of the gas in a set area on the water-cooled wall surface. The pressure measuring component is suitable for measuring the gas pressure in a set area on the water-cooled wall surface. The gas guiding component is suitable for guiding the gas in the set area on the water-cooled wall surface to the sampling component.

4. The boiler wall wind adjustment system according to claim 1, characterized in that: There are a plurality of the nozzles, and the plurality of nozzles are evenly spaced apart along a width direction of the nozzle.

5. A boiler wall wind regulation method based on the boiler wall wind regulation system according to any one of claims 1 to 4, characterized in that: The steps include: The distribution of reducing atmosphere on the water wall surface is continuously acquired through the detection system; The direction and volume of the primary air sprayed by the nozzle are determined according to the distance between the nozzle and the area with high reducing atmosphere on the water-cooled wall surface and the concentration of reducing gas in the area; Open the nozzle to blow primary air to the area with high reducing atmosphere on the water-cooled wall surface until the detection system detects that the concentration of reducing gas in this area is lower than the set threshold.

6. The boiler wall wind adjustment method according to claim 5, characterized in that: The following steps are used to continuously obtain the distribution of the reducing atmosphere on the water wall surface through the detection system: The reducing gas concentration at multiple points on the water wall surface is obtained through multiple detection probes; According to the reducing gas concentration at multiple points on the water-cooled wall surface, the continuous distribution of the reducing gas concentration at various locations on the water-cooled wall surface is calculated by interpolation.

7. The boiler wall wind regulation method according to claim 5, characterized in that: The following steps are also included: The air volume of the wall-attached wind on the surface of the water-cooled wall is detected by multiple detection probes; According to the air volume of the wall-adhering wind on the water-cooled wall surface, the area with a smaller air volume of the wall-adhering wind on the water-cooled wall surface is obtained; Adjust the direction of the airflow from the nozzle and spray the primary air to the area on the water-cooled wall surface where the air volume of the wall wind is small.

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