CN116106503A - Cold state test device and method for turbulent flow of ammonia-coal mixed fuel - Google Patents

Abstract

The invention discloses a cold-state test device and method for turbulent flow of ammonia-coal mixed fuel. During the test, media with different particle sizes are configured as test media according to the preset mixing ratio of ammonia-coal fuel, and are carried by primary wind. The test medium enters the primary air pipe and enters the chamber from the outlet end of the primary air pipe, and the secondary air enters the annular space through the cyclone to mix with the test medium entering the primary air pipe. The above method is used to simulate the ammonia-coal mixed fuel Turbulent flow under actual mixing conditions in a combustor. The laser Doppler wind velocity measurement device is mainly used to measure the gas phase/solid phase average velocity, radial/tangential average velocity, root mean square velocity, radial/tangential root mean square velocity and particle average particle size in the burner Distribution, so as to obtain the turbulent flow characteristics of the ammonia-coal mixed fuel in the burner, clarify the change law of the turbulent flow characteristics in the burner, and then facilitate the design and optimization of the burner.

Description

Cold test device and method for turbulent flow of ammonia-coal mixed fuel

technical field

The invention relates to the technical field of ammonia-coal combustion tests, in particular to a cold-state test device and method for turbulent flow of ammonia-coal mixed fuel.

Background technique

As a zero-carbon fuel, ammonia can be directly used as fuel for coal-fired boilers. Compared with traditional fossil fuels, it can significantly reduce carbon dioxide emissions. Under the national double-carbon target, ammonia as a hydrogen carrier is a new type of renewable Zero-carbon fuel is one of the high-quality alternative fuels for pulverized coal boilers. The low reactivity and high nitrogen content of ammonia molecules cause it to face the problems of difficult fire, stable combustion and high NOx emissions. Therefore, ammonia-coal co-firing is one of the effective technical paths for pulverized coal boilers to reduce carbon dioxide emissions.

However, ammonia-coal mixed fuel has the problem of difficult combustion stability. In order to further study the difficult problem of combustion stability, the research on the turbulent flow characteristics of ammonia-coal mixed fuel in the burner is of great significance to the design and optimization of the burner.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the embodiment of the present invention proposes a kind of cold test device for the turbulent flow of ammonia-coal mixed fuel, so as to facilitate the design and optimization of the burner. The cold test method is used to facilitate the design and optimization of the burner.

The cold state test device for the turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention includes a support frame, a burner and a laser Doppler wind speed measurement device, the burner is arranged on the support frame, and the burner includes A casing, a swirler, and a primary air duct, the casing is made of transparent material, the casing has a chamber, a casing inlet and a casing outlet, the casing inlet and the casing outlet are arranged oppositely and are connected to the chamber, the outlet end of the cyclone is connected to the inlet of the housing, the primary air pipe is inserted on the cyclone and the outlet end of the primary air pipe is placed in the inside the chamber;

The laser Doppler anemometer includes a laser emitting assembly, a first reflector, a second reflector, a receiving lens, a processor and a computer, and the first reflector and the second reflector are spaced from the laser emitting assembly Located on both sides of the housing, the laser emitting assembly can emit a first laser and a second laser, the optical paths of the first laser and the second laser intersect and the intersection point is located in the chamber, the first The reflecting mirror can receive the first laser light and reflect the received first laser light to the receiving lens, and the second reflecting mirror can receive the second laser light and reflect the received second laser light to the receiving lens. The receiving lens, the receiving lens can transmit the received first laser light and the second laser light to the processor, and the processor can process the received first laser light and the second laser light and The processed information is transmitted to the computer.

In some embodiments, the burner further includes a return cap, the return cap is located in the chamber and provided at the outlet end of the primary air duct.

In some embodiments, the housing includes a top board, a bottom board and at least three side boards, the at least three side boards are connected end to end in sequence, the top board and the bottom board are connected to each of the side boards, so The chamber is defined by the top plate, the bottom plate and the side plate, the housing inlet is set on the top plate, the shell outlet is set on the bottom plate, facing the laser emitting assembly The material of the side plate is quartz glass.

In some embodiments, the outlet end of the primary air pipe is spaced apart from the housing outlet in the axial direction of the primary air pipe, and the length of the primary air pipe protruding into the chamber is the same as the length of the primary air pipe. The length ratio of the primary air pipe to the outlet of the casing is 1.2-1.6.

In some embodiments, the portion of the primary air duct facing the laser emitting assembly is covered with a black coating.

In some embodiments, the cold state test device for the turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention also includes a primary air duct, a Roots blower, a feeder, a secondary air duct and a blower, and the primary air duct The outlet of the outlet communicates with the inlet end of the primary air pipe, the feeder communicates with the primary air pipe, the Roots blower is arranged on the primary air pipe, and the Roots blower is used to feed the primary air and the test medium in the feeder are delivered to the primary air duct;

The outlet end of the secondary air duct communicates with the inlet end of the cyclone, the blower is arranged on the secondary air duct, and the blower is used to deliver the secondary air to the cyclone.

In some embodiments, the cold-state test device for turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention further includes a delivery pipeline, a storage container and an exhaust fan, the inlet end of the delivery pipeline communicates with the outlet of the housing, The outlet end of the conveying pipeline communicates with the storage container, and the suction fan is arranged on the conveying pipeline, so as to transport the test medium after the test to the storage container for storage.

The cold test method for turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention is based on the cold test device for turbulent flow of ammonia-coal mixed fuel described in any of the above embodiments, including:

The first medium with a particle size of less than 10 μm is used to trace ammonia, and the second medium with a particle size of less than 10 μm-100 μm is used to trace coal powder;

The first medium and the second medium are configured as a test medium according to a preset blending ratio, and the primary air and the test medium are transported into the primary air duct;

The cyclone transports the secondary air into the chamber;

The laser Doppler anemometer measures multiple measurement points in the chamber.

In some embodiments, the plurality of measurement points are divided into multiple groups, each group of measurement points includes a plurality of measurement points, and the plurality of groups of measurement points are arranged at intervals along the axial direction of the primary air duct, each A plurality of the measurement points in the group of the measurement points are arranged at intervals along the radial direction of the primary air duct.

In some embodiments, multiple measurement points in each group of measurement points are located on the same radial side of the primary air duct, and the distance between two adjacent measurement points is along the distance from the primary air duct. The direction of the air duct increases sequentially.

During the test of the cold-state test device for the turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention, the ammonia-coal fuel is configured according to the preset blending ratio, and the media with different particle sizes are configured according to the preset blending ratio of the ammonia-coal fuel. test medium. The primary air carries the test medium into the primary air pipe and enters the chamber from the outlet end of the primary air pipe. An annular space is formed between the outer peripheral surface of the primary air pipe and the shell, and the secondary air enters the annular space through the cyclone and is connected with the primary The test medium entering the air duct is mixed. The above method is used to simulate the turbulent flow of ammonia-coal mixed fuel in the actual mixed state in the burner, and the laser Doppler wind velocity measurement device is mainly used to measure the gas phase/solid phase average velocity and radial/tangential average velocity in the burner Velocity, root mean square velocity, radial/tangential root mean square velocity and particle average particle size distribution, by adjusting the mixing ratio of ammonia-coal mixed fuel, the swirl intensity of the secondary air and the size of the shell, etc., so that The turbulence characteristics of the ammonia-coal mixed fuel in the burner are obtained, and the change law of the turbulent flow characteristics in the burner is clarified, so as to facilitate the design and optimization of the burner, and to study the problem of difficult combustion stability of the ammonia-coal mixed fuel.

Description of drawings

Fig. 1 is a schematic structural diagram of a cold-state test device for turbulent flow of ammonia-coal mixed fuel according to an embodiment of the present invention, with the laser Doppler wind speed measurement device hidden.

Fig. 2 is a working schematic diagram of the laser Doppler wind velocity measurement device used for the cold-state test device of ammonia-coal mixed fuel turbulent flow according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of the distribution of measurement points in the burner of the cold test device for the turbulent flow of ammonia-coal mixed fuel according to the embodiment of the present invention.

Reference signs:

support frame 1;

Burner 2; shell 201; chamber 2011; shell inlet 2012; shell outlet 2013; swirler 202; primary air duct 203; return cap 204;

Laser Doppler wind speed measuring device 3; laser emitting component 301; laser 3011; first laser 30111; second laser 30112; beam splitter 3012; convex lens 3013; ; Processor 305; Computer 306; Photomultiplier tube 307;

Primary air duct 4;

Roots blower 5;

Feeder 6;

Secondary air duct 7;

Blower 8;

Delivery pipeline 9;

storage container 10;

exhaust fan 11;

Measure point 12.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The technical solutions of the present application are described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 3 , the cold test device for turbulent flow of ammonia-coal mixed fuel according to the embodiment of the present invention includes a support frame 1 , a burner 2 and a laser Doppler anemometer 3 . The burner 2 is arranged on the support frame 1, the burner 2 includes a housing 201, a swirler 202 and a primary air duct 203, the housing 201 is made of transparent material, the housing 201 has a chamber 2011, a housing inlet 2012 and a shell The body outlet 2013, the casing inlet 2012 and the casing outlet 2013 are arranged oppositely and all communicate with the chamber 2011, the cyclone 202 is arranged at the casing outlet 2013 and the outlet end of the cyclone 202 communicates with the casing inlet 2012, once The air duct 203 is inserted on the cyclone 202 and the outlet end of the primary air duct 203 is placed in the chamber 2011 .

The laser Doppler anemometer 3 includes a laser emitting component 301 , a first reflector 302 , a second reflector 303 , a receiving lens 304 , a processor 305 and a computer 306 . The first reflecting mirror 302 and the second reflecting mirror 303 are spaced apart from the laser emitting assembly 301 on both sides of the casing 201, the laser emitting assembly 301 can emit the first laser 30111 and the second laser 30112, the first laser 30111 and the second laser 30111 The optical paths of the laser light 30112 intersect and the intersection point is located in the chamber 2011 . The first reflector 302 can receive the first laser light 30111 and reflect the received first laser light 30111 to the receiving lens 304, and the second reflector 303 can receive the second laser light 30112 and reflect the received second laser light 30112 to the receiving lens 304 Above, the receiving lens 304 can transmit the received first laser light 30111 and the second laser light 30112 to the processor 305, and the processor 305 can process the received first laser light 30111 and the second laser light 30112 and transmit the processed information to the computer 306 .

It should be noted that the casing 201 is made of transparent material, so that the first laser light 30111 and the second laser light 30112 emitted by the laser emitting component 301 can pass through the casing 201 and be reflected by the first reflector 302 and the second laser light. Mirror 303 reflects to receiving lens 304 . Since the pulverized coal is a black medium, in order to prevent the pulverized coal from adhering to the inner wall of the housing 201 and affecting the passage of the first laser 30111 and the second laser 30112 through the housing 201, white test media with different particle sizes were used during the test. Experiments were carried out on tracer ammonia and coal powder. For example, those skilled in the art can understand that glass microspheres with a particle size of less than 10 μm are used for tracing ammonia, and glass microspheres with a particle size of 10 μm-100 μm are used for tracing coal powder.

During the test of the cold state test device for turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention, the ammonia-coal fuel is mixed according to the preset mixing ratio, and the glass beads of different particle sizes are mixed according to the preset mixing ratio of ammonia-coal fuel Configured as a test medium. Use the primary wind to carry the test medium into the primary air pipe 203 and enter the chamber 2011 from the outlet end of the primary air pipe 203. An annular space is formed between the outer peripheral surface of the primary air pipe 203 and the shell 201, and the secondary air passes through the cyclone 202 enters the annular space and mixes with the test medium entered by the primary air pipe 203. The above method is used to simulate the turbulent flow of the ammonia-coal mixed fuel in the actual mixed state in the burner 2 .

As shown in FIG. 2 , the intersection point of the optical paths of the first laser 30111 and the second laser 30112 emitted by the laser emitting component 301 is located in the chamber 2011. It should be noted that the first laser 30111 and the second laser 30112 are in the chamber 2011 The intersection point of is the measurement point 12. The first laser 30111 and the second laser 30112 pass through the casing 201 and are reflected by the first mirror 302 and the second mirror 303 to the receiving lens 304, and the receiving lens 304 passes the received first laser 30111 and second laser 30112 through the The photomultiplier tube 307 amplifies and transmits to the processor 305 for processing, and the information processed by the processor 305 is transmitted to the computer 306, and the computer 306 displays the measurement results.

The laser Doppler wind velocity measurement device 3 is mainly used to measure the gas phase/solid phase average velocity, radial/tangential average velocity, root mean square velocity, radial/tangential root mean square velocity and particle average particle size in the burner 2. diameter distribution, by adjusting the mixing ratio of the ammonia-coal mixed fuel, the swirl intensity of the secondary air, and the size of the shell 201 and other working conditions, the turbulence characteristics of the ammonia-coal mixed fuel in the burner 2 are obtained, and the burner 2 is clarified. The change law of turbulent flow characteristics, and then in order to design and optimize the burner 2, in order to study the problem of difficult combustion stability of ammonia-coal mixed fuel.

Therefore, the cold-state test device for the turbulent flow of the ammonia-coal mixed fuel in the embodiment of the present invention can obtain the turbulent flow characteristics of the ammonia-coal mixed fuel in the burner 2 , so as to design and optimize the burner 2 .

Optionally, as shown in Figure 2, the laser emitting assembly 301 includes a laser 3011, a beam splitter 3012 and a convex lens 3013, a beam of laser light emitted by the laser 3011 can enter the beam splitter 3012, and the beam splitter 3012 can receive a The laser beam is divided into parallel first laser 30111 and second laser 30112 , the first laser 30111 and second laser 30112 can enter the convex lens 3013 , the first laser 30111 and the second laser 30112 intersect after being refracted by the convex lens 3013 .

In some embodiments, the burner 2 further includes a return cap 204 , the return cap 204 is located in the chamber 2011 and arranged at the outlet end of the primary air pipe 203 .

For example, as shown in Figures 2 and 3, the primary air carries the test medium from the outlet end of the primary air pipe 203 to the return cap 204, and is ejected in reverse through the return channel formed between the outer wall of the primary air pipe 203 and the return cap 204 , the sprayed primary air and test medium are mixed with the secondary air entering the chamber 2011 from the cyclone 202 . Therefore, by setting the return cap 204, it can also be used to simulate the turbulent flow when the ammonia-coal mixed fuel enters the burner 2 in a reverse direct flow manner, so that the turbulent flow of the ammonia-coal mixed fuel in the embodiment of the present invention The cold test device has strong versatility.

In some embodiments, the housing 201 includes a top board, a bottom board and at least three side boards, the at least three side boards are connected end to end in sequence, the top board and the bottom board are connected to each side board, the top board, the bottom board and at least three side boards define Out of the chamber 2011, the housing inlet 2012 is set on the top plate, the shell outlet 2013 is set on the bottom plate, and the material of the side plate facing the laser 3011 is quartz.

For example, as shown in Figures 1 to 3, the housing 201 is a cube, and the housing 201 includes four side plates, the four side plates are sealed from head to tail in turn, the top plate is sealed to the top of the four side plates, and the bottom plate is connected to the four side plates. The bottom end of the side plate is sealed and connected. The material of the side plate facing the laser 3011 is set to quartz material, and the other three side plates are made of plexiglass, which can effectively reduce the phenomenon of glass beads sticking to the wall, so as to ensure the light transmittance of the housing 201 and prevent it from affecting the first The laser 30111 and the second laser 30112 enter the casing 201, which affects the accuracy of the test results. It should be noted that before each test, the side plate of the casing 201 must be wiped clean to reduce the error of the test system.

Of course, in some other embodiments, the casing 2 can also be a cylinder.

In some embodiments, the outlet end of the primary air pipe 203 and the casing outlet 2013 are arranged at intervals in the axial direction of the primary air pipe 203, and the length of the primary air pipe 203 protruding into the chamber 2011 is the same as the distance between the primary air pipe 203 and the housing. The length ratio of the body outlet 2013 is 1.2-1.6.

Specifically, as shown in Figure 3, the height of the housing 201 is 655 mm, the housing inlet 2012 and the housing outlet 2013 are arranged oppositely in the up and down direction, the housing outlet 2013 is located directly below the outlet end of the primary air duct 203, and the primary air duct The length of 203 extending into the chamber 2011 is 385mm, the length of the outlet end of the primary air duct 203 from the housing outlet 2013 is 270mm, and the ratio of 385mm to 270mm is 1.426.

Therefore, the ratio of the length of the primary air pipe 203 extending into the chamber 2011 to the length of the primary air pipe 203 from the housing outlet 2013 can be reasonably set during the test, so the impact of the housing outlet 2013 on the burner 2 can be ignored. The influence of the regional flow field further ensures the accuracy of the test results.

In some embodiments, the part of the primary air duct 203 facing the laser 3011 is covered with a black coating.

It can be understood that, due to the particularity of the primary air duct 203, painting the surface of the primary air duct 203 facing the laser 3011 black can eliminate the influence of metal on the laser, thereby further improving the efficiency of the ammonia in the embodiment of the present invention. Experimental accuracy of a cold test setup for turbulent flow of coal blended fuel.

In some embodiments, the cold test device for the turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention further includes a primary air duct 4 , a Roots blower 5 , a feeder 6 , a secondary air duct 7 and a blower 8 . The outlet of the primary air duct 4 communicates with the inlet end of the primary air duct 203, the feeder 6 communicates with the primary air duct 4, the Roots blower 5 is arranged on the primary air duct 4, and the Roots blower 5 is used to combine the primary air and the supply air. The test medium in the feeder 6 is delivered to the primary air duct 203. The secondary air duct 7 communicates with the inlet end of the cyclone 202 , and the blower 8 is arranged on the secondary air duct 7 , and the blower 8 is used to deliver the secondary air to the cyclone 202 .

As shown in Figure 1, the cold test device for the turbulent flow of the ammonia-coal mixed fuel of the embodiment of the present invention is in use, the air inlet of the primary air duct 4 and the air inlet of the secondary air duct 7 are connected to the air box (Fig. Not shown in ), and then the test medium is placed in the feeder 6 , and the Roots blower 5 delivers the primary air and the test medium to the primary air duct 203 . The blower 8 delivers the secondary air to the cyclone 202 , and the cyclone 202 delivers the secondary air to the annular space between the primary air duct 203 and the casing 201 by adjusting the swirl strength of the cyclone 202 .

Thus, by arranging the primary air duct 4, the Roots blower 5, and the feeder 6, it is convenient to transport the primary air and the test medium into the primary air duct 203; by setting the secondary air duct 7 and the blower 8, it is convenient for the secondary The wind is transported into the burner 2.

In some embodiments, the cold state test device for the turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention also includes a delivery pipeline 9, a storage container 10 and an exhaust fan 11, and the inlet end of the delivery pipeline 9 communicates with the casing outlet 2013 , the outlet end of the delivery pipe 9 communicates with the storage container 10, and the exhaust fan 11 is arranged on the delivery pipe 9, so as to transport the tested test medium into the storage container 10.

For example, as shown in Figure 1, the test medium in the burner 2 is discharged through the casing outlet 2013, and enters the delivery pipeline 9 under the action of the exhaust fan 11, and finally enters the storage container 10, and stores the test medium after the test. Preventing the test medium from polluting the environment makes the cold state test device for the turbulent flow of ammonia-coal mixed fuel in the embodiment of the present invention more environmentally friendly.

The cold-state test method for the turbulent flow of ammonia-coal mixed fuel according to the embodiment of the present invention is based on the cold-state test device for turbulent flow of ammonia-coal mixed fuel in any of the above-mentioned embodiments, including:

The first medium with a particle size of less than 10 μm is used to trace ammonia, and the second medium with a particle size of less than 10 μm-100 μm is used to trace coal powder;

Configure the first medium and the second medium according to the preset mixing ratio as the test medium, and transport the primary air and the test medium into the primary air duct 203;

The cyclone 202 transports the secondary air into the chamber 2011;

The laser Doppler anemometer 3 measures multiple measurement points in the chamber 2011 .

For example, both the first medium and the second medium can be glass microspheres, and the glass microspheres are white. By tracking ammonia and coal powder with glass microspheres of different particle sizes, the housing 2 will not be damaged due to long-term tests. The transparency of the inner wall of the housing 201 is reduced to prevent the first laser 30111 and the second laser 30112 from entering the housing 2, thereby affecting the accuracy of the test.

In some embodiments, the multiple measurement points 12 are divided into multiple groups, the multiple groups of the measurement points 12 are arranged at intervals along the axial direction of the primary air duct 203, and each group of the measurement points 12 includes a plurality of the Measuring points 12 , a plurality of measuring points 12 in each group of measuring points 12 are arranged at intervals along the radial direction of the primary air duct 203 .

For example, as shown in FIG. 3 , by measuring the gas-solid two-phase flow characteristics in the axial and radial ranges of the primary air duct 203 , the number of samples for each measurement point is 5000 during the test. Thus, the turbulent flow characteristics of the ammonia-coal mixed fuel in the axial and radial ranges of the primary air duct 203 in the burner 2 are obtained, which is conducive to accurately clarifying the change law of the turbulent flow characteristics in the burner 2, and thus facilitates the design and implementation of the burner 2. optimization.

In some embodiments, as shown in FIG. 3 , multiple measurement points 12 in each group of measurement points 12 are located on the same side of the primary air duct 203 in its radial direction, and the distance between two adjacent measurement points 12 is along the distance from the primary The direction of the air duct 203 increases sequentially.

For example, as shown in Figure 3, each group of measuring points 12 includes seven measuring points 12, wherein seven measuring points 12 are located on one side of the primary air duct 203 in its radial direction, and the seven measuring points 12 are all along the direction away from the primary air duct. The direction of 203 is arranged from dense to sparse.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the 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. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

As used herein, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" mean specific features, structures, materials, or features described in connection with the embodiment or example. A feature is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the above-mentioned embodiments have been shown and described, it can be understood that the above-mentioned embodiments are exemplary, and should not be construed as limitations on the present invention. Changes, modifications, substitutions and variations made by those skilled in the art to the above-mentioned embodiments All within the protection scope of the present invention.

Claims (10)

1. A cold test device for ammonia-coal mixed fuel turbulent flow, characterized in that, comprising: support frame (1); A burner (2), the burner (2) is arranged on the support frame (1), and the burner (2) includes a casing (201), a swirler (202) and a primary air duct (203 ), the housing (201) is made of a transparent material, the housing (201) has a chamber (2011), a housing inlet (2012) and a housing outlet (2013), and the housing inlet (2012) Arranged opposite to the housing outlet (2013) and communicated with the chamber (2011), the outlet end of the cyclone (202) communicates with the housing inlet (2012), the primary air duct (203) is inserted on the cyclone (202) and the outlet end of the primary air pipe (203) is placed in the chamber (2011); and Laser Doppler wind speed measurement device (3), described laser Doppler wind speed measurement device (3) comprises laser emitting assembly (301), first reflection mirror (302), second reflection mirror (303), receiving lens ( 304), a processor (305) and a computer (306), the first reflector (302) and the second reflector (303) are spaced apart from the laser emitting assembly (301) in the housing (201) The laser emitting component (301) can emit the first laser (30111) and the second laser (30112), the optical paths of the first laser (30111) and the second laser (30112) intersect and the intersection point is located at In the chamber (2011), the first reflecting mirror (302) can receive the first laser light (30111) and reflect the received first laser light (30111) to the receiving lens (304), The second reflector (303) can receive the second laser light (30112) and reflect the received second laser light (30112) to the receiving lens (304), and the receiving lens (304) can The received first laser light (30111) and the second laser light (30112) are transmitted to the processor (305), and the processor (305) is capable of processing the received first laser light (30111) and the received said second laser (30112) and transmit the processed information to said computer (306). 2. The cold test device for ammonia-coal mixed fuel turbulent flow according to claim 1, characterized in that, the burner (2) also includes a return cap (204), and the return cap (204) is located at The chamber (2011) is disposed at the outlet end of the primary air pipe (203). 3. The cold test device for turbulent flow of ammonia-coal mixed fuel according to claim 1, characterized in that, the housing (201) comprises a top plate, a bottom plate and at least three side plates, and the at least three The side plates are connected end to end in sequence, the top plate and the bottom plate are connected to each of the side plates, the top plate, the bottom plate and the side plates define the chamber (2011), and the housing inlet (2012) is arranged on the top plate, the casing outlet (2013) is arranged on the bottom plate, and the material of the side plate facing the laser emitting component (301) is quartz glass. 4. The cold state test device for the turbulent flow of ammonia-coal mixed fuel according to claim 1, characterized in that, the outlet end of the primary air pipe (203) and the housing outlet (2013) are in the The primary air duct (203) is arranged at intervals in the axial direction, and the length of the primary air duct (203) protruding into the chamber (2011) is the same as the distance between the primary air duct (203) and the housing outlet ( 2013) with a length ratio of 1.2-1.6. 5. The cold state test device for the turbulent flow of ammonia-coal mixed fuel according to claim 1, characterized in that, the position facing the primary air duct (203) of the laser emitting assembly (301) is covered with Has a black finish. 6. the cold test device for ammonia-coal mixed fuel turbulent flow according to claim 1, is characterized in that, also comprises: Primary air duct (4), Roots blower (5) and feeder (6), the outlet of described primary air duct (4) communicates with the inlet end of described primary air duct (203), and the feeder (6) communicated with the primary air duct (4), the Roots blower (5) is located on the primary air pipeline (4), and the Roots blower (5) is used to combine the primary wind with the The test medium in the feeder (6) is transported into the primary air duct (203); and Secondary air pipeline (7) and blower (8), the outlet end of described secondary air pipeline (7) is communicated with the inlet end of described cyclone (202), and described blower (8) is located at described two On the secondary air duct (7), the blower (8) is used to deliver the secondary air to the cyclone (202). 7. the cold state test device for ammonia-coal mixed fuel turbulent flow according to claim 6, is characterized in that, also comprises conveying pipeline (9), storage container (10) and exhaust fan (11), described conveying The inlet end of the pipeline (9) communicates with the housing outlet (2013), the outlet end of the conveying pipeline (9) communicates with the storage container (10), and the exhaust fan (11) is arranged on the conveying on the pipeline (9), so that the test medium after the test is transported to the storage container (10) for storage. 8. A cold test method for turbulent flow of ammonia-coal mixed fuel, characterized in that the method is based on the cold test device for turbulent flow of ammonia-coal mixed fuel according to any one of claims 1-7 ,include: The first medium with a particle size of less than 10 μm is used to trace ammonia, and the second medium with a particle size of less than 10 μm-100 μm is used to trace coal powder; configuring the first medium and the second medium into a test medium according to a preset blending ratio, and transporting the primary air and the test medium into the primary air duct (203); The cyclone (202) transports the secondary air into the chamber (2011); The laser Doppler anemometer (3) measures a plurality of measurement points (12) in the chamber (2011). 9. the cold state test method that is used for the turbulent flow of ammonia-coal mixed fuel according to claim 8, is characterized in that, a plurality of said measurement points (12) is divided into multiple groups, and each group of said measurement points (12) It includes a plurality of measurement points (12), and a plurality of groups of measurement points (12) are arranged at intervals along the axial direction of the primary air duct (203), and a plurality of the measurement points (12) in each group are The measuring points (12) are arranged at intervals along the radial direction of the primary air duct (203). 10. the cold state test method that is used for the turbulent flow of ammonia-coal mixed fuel according to claim 9, is characterized in that, a plurality of said measuring points (12) in each group of said measuring points (12) are located at said The primary air duct (203) is on the same side in the radial direction, and the distance between two adjacent measurement points (12) increases sequentially along the direction away from the primary air duct (203).

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