CN116148414A - Flat flame combustion experiment device for ammonia coal biomass mixed combustion and use method thereof - Google Patents

Abstract

The invention discloses a flat flame combustion experimental device for mixed combustion of ammonia coal biomass and a use method thereof. According to the flat flame combustion experimental device provided by the embodiment of the invention, the form of the combustion flame of the ammonia coal biomass on the flat flame burner is observed through the first cylinder, the components of gas molecules in the smoke after combustion are detected through the sampling port, and the chemical analysis or specific gravity analysis is carried out on the particulate matters in the smoke through the particulate matter trapping device, so that the combustion mechanism and the emission characteristic of the ammonia coal biomass on the flat flame burner can be explored, and the device can be used for clarifying the interaction of the mixed combustion of the ammonia coal biomass. Therefore, the flat flame combustion experimental device provided by the embodiment of the invention can obtain the combustion mechanism and emission characteristic of the ammonia coal biomass mixed combustion on the flat flame burner, and is used for clarifying the interaction between the ammonia coal biomass mixed combustion.

Description

Flat flame combustion experiment device for ammonia coal biomass mixed combustion and use method thereof

Technical Field

The invention relates to the technical field of ammonia coal combustion tests, in particular to a flat flame combustion experiment device for mixed combustion of ammonia coal biomass and a use method thereof.

Background

How to strengthen clean and efficient utilization of coal is a problem to be solved urgently, and along with development of new energy, coal is used as a guarantee energy source, and a coal motor group needs to meet the requirements of safe, stable and efficient operation of a boiler under deep peak shaving. Based on the method, ammonia is used as a clean, carbon-free and high-energy-density fuel, and the mixed combustion of coal dust, ammonia and biomass is an effective way for promoting the more efficient, clean, low-carbon and flexible development of a coal motor group, and is an effective measure for solving the stable combustion and burnout of a boiler under the low-load combustion condition and promoting the organic fusion and complementary development of the coal motor group and new energy. Therefore, an ammonia-coal biomass mixed combustion experiment is carried out on a flat flame burner, the combustion mechanism and the emission characteristic of the ammonia-coal biomass mixed combustion experiment are explored, and the method is very important for clarifying the interaction of the ammonia-coal biomass mixed combustion.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a flat flame combustion experimental device for mixed combustion of ammonia coal biomass, so as to obtain a combustion mechanism and emission characteristics of the mixed combustion of the ammonia coal biomass on a flat flame burner, and the device is used for clarifying interaction between the mixed combustion of the ammonia coal biomass; the invention also discloses a use method of the flat flame combustion experimental device for the mixed combustion of the ammonia-coal biomass, so as to obtain a combustion mechanism and emission characteristics of the mixed combustion of the ammonia-coal biomass on the flat flame burner, and the use method is used for clarifying interaction between the mixed combustion of the ammonia-coal biomass.

The flat flame combustion experimental device for the ammonia coal biomass mixed combustion comprises a support frame, a dryer, a feeder, a flat flame burner, a first cylinder body and a particulate matter trapping device, wherein the dryer and the feeder are arranged on the support frame, and the dryer is communicated with the feeder so as to convey dried biomass powder to the feeder;

the flat flame burner is arranged on the support frame, a first air inlet, a plurality of first air outlets, a plurality of second air inlets, a plurality of second air outlets, a plurality of third air inlets and a plurality of third air outlets are arranged on the flat flame burner, the first air inlets, the second air outlets and the third air outlets are communicated with the first air inlets, the plurality of second air outlets, the third air inlets and the plurality of third air outlets are communicated with the second air inlets, the flat flame burner is further provided with a combustion plane, the first air outlets, the second air outlets and the third air outlets are all arranged on the combustion plane, and the feeder is communicated with the first air inlets so as to convey pulverized coal and biomass powder to the flat flame burner;

the first cylinder is made of transparent materials, one end of the first cylinder is connected with the flat flame burner, the combustion plane is arranged in the first cylinder, and a plurality of sampling ports which are arranged at intervals are arranged on the first cylinder in the axial direction of the first cylinder;

the particle trapping device is communicated with the other end of the first cylinder, a multi-stage sampling membrane is arranged in the particle trapping device and used for collecting particles in combustion flue gas of the flat flame burner.

In some embodiments, the plurality of sampling ports comprises a first portion and a second portion, the first portion being disposed more adjacent to the combustion plane than the second portion in an axial direction of the first barrel, each of the first portion and the second portion comprising the plurality of sampling ports therein;

the distance between any two adjacent sampling ports in the first part is smaller than the distance between any two adjacent sampling ports in the second part.

In some embodiments, a plurality of the sampling ports in the first portion are uniformly spaced apart and/or a plurality of the sampling ports in the second portion are uniformly spaced apart.

In some embodiments, the flat flame combustion experimental device for mixed combustion of ammonia coal biomass further comprises a water cooling device, wherein the water cooling device is arranged on the flat flame burner, a cooling cavity, a first water inlet and a first water outlet which are communicated with the cooling cavity are formed in the water cooling device, and the water cooling device is used for cooling the flat flame burner.

In some embodiments, the flat flame combustion experiment device for ammonia coal biomass mixed combustion further comprises a heat tracing belt, wherein the heat tracing belt surrounds the particulate matter trapping device, and the heat tracing belt is used for heating the sampling film to a temperature ranging from the temperature to the temperature.

In some embodiments, the flat flame combustion experimental device for mixed combustion of ammonia coal biomass further comprises a heating pipe, wherein the heating pipe comprises an inner pipe and an outer pipe which are arranged at intervals in the inner-outer direction, a heating cavity is defined between the inner pipe and the outer pipe, a fourth air inlet and a fourth air outlet are formed in the inner pipe, a second water inlet and a second water outlet which are communicated with the heating cavity are formed in the outer pipe, and the fourth air inlet is arranged in the first cylinder.

In some embodiments, the flat flame combustion experimental device for ammonia coal biomass mixed combustion further comprises a filter, wherein the filter is arranged between the heating pipe and the particulate matter trapping device, and flue gas discharged by the heating pipe enters the particulate matter trapping device after being filtered by the filter.

In some embodiments, the particulate matter trapping device is an impact dust particle sizer ELPI.

The application method of the flat flame combustion experimental device for mixed combustion of ammonia coal biomass provided by the embodiment of the invention is based on the flat flame combustion experimental device for mixed combustion of ammonia coal biomass, and comprises the following steps of:

before ignition, weighing the sampling film, recording weighing data, ensuring that ambient air flow is stable and the ambient temperature is constant in the weighing process, and simultaneously introducing nitrogen into the first air inlet, the second air inlet and the third air inlet to discharge other gases in a pipeline;

drying biomass powder in a dryer to remove water, conveying the dried biomass powder into a feeder, and adding pulverized coal into the feeder to mix with the dried biomass powder;

introducing nitrogen and oxygen into the first air inlet according to a first preset proportion, introducing carbon monoxide and ammonia into the second air inlet according to a second preset proportion, introducing pulverized coal and biomass powder in a nitrogen carrying feeder into the third air inlet, and then igniting the flat flame burner;

observing the flame form of the flat flame burner in the combustion process, sampling the smoke after the flat flame burner burns through the sampling port, and analyzing the components in the sampled smoke by using a smoke molecularly instrument;

and (3) carrying out chemical analysis or specific gravity analysis on the smoke particles in the sampling films of each stage by using an impact type dust particle classifier ELPI so as to detect the change of elements, morphology and content in the smoke.

According to the flat flame combustion experimental device provided by the embodiment of the invention, the form of the combustion flame of the ammonia coal biomass on the flat flame burner is observed through the arrangement of the first cylinder, the components of gas molecules in the smoke after the combustion of the ammonia coal biomass are detected through the sampling port, and the chemical analysis or the specific gravity analysis is carried out on the particulate matters in the smoke through the arrangement of the particulate matter capturing device, so that the combustion mechanism and the emission characteristic of the ammonia coal biomass on the flat flame burner can be explored, and the interaction of the mixed combustion of the ammonia coal biomass can be clarified.

Therefore, the flat flame combustion experimental device provided by the embodiment of the invention can obtain the combustion mechanism and emission characteristic of the ammonia coal biomass on the flat flame burner, and is used for clarifying the interaction between the mixed combustion of the ammonia coal biomass.

Drawings

Fig. 1 is a schematic structural view of a flat flame combustion experiment apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic view of a flat flame burner and a first barrel of a flat flame combustion experimental apparatus according to an embodiment of the present invention.

Fig. 3 is a top view of a flat flame burner of a flat flame combustion experimental apparatus of an embodiment of the invention.

Reference numerals:

a flat flame combustion experiment device 100;

a support frame 1;

a flat flame burner 2; a first air inlet 201; a second air inlet 202; a third air inlet 203; a first air outlet 204; a second air outlet 205; a third air outlet 206; a combustion plane 207;

a first cylinder 3; a first portion 301; a second portion 302; a sampling port 303;

a particulate matter trapping device 4;

a water cooling device 5; a cooling chamber 501; a first water inlet 502; a first water outlet 503;

a heat tracing belt 6;

a heating pipe 7; an inner tube 701; a fourth air inlet 7011; a fourth air outlet 7012; an outer tube 702; a second water inlet 7021; a second water outlet 7022; a heating chamber 703;

a filter 8;

a dryer 9;

a feeder 10.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

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

As shown in fig. 1 and 2, the flat flame combustion experiment apparatus 100 according to the embodiment of the present invention includes a support frame 1, a dryer 9, a feeder 10, a flat flame burner 2, a first cylinder 3, and a particulate matter trapping device 4. The dryer 9 and the feeder 10 are both arranged on the supporting frame, and the dryer 9 is communicated with the feeder 10 so as to convey dried biomass powder to the feeder 10.

The flat flame burner 2 is arranged on the support frame 1, the flat flame burner 2 is provided with a first air inlet 201, a plurality of first air outlets 204, a second air inlet 202, a second air outlet 205, a third air inlet 203 and a plurality of third air outlets 206, wherein the first air outlets 204, the second air inlets 202, the second air outlets 205, the third air inlets 203 and the third air inlets 206 are communicated with the first air inlet 201, the flat flame burner 2 is also provided with a combustion plane 207, and the plurality of first air outlets 204, the plurality of second air outlets 205 and the third air outlets 206 are all arranged on the combustion plane 207, and the feeder 10 is communicated with the first air inlets so as to convey pulverized coal and biomass powder to the flat flame burner 2.

The first cylinder 3 is made of transparent material, for example, transparent glass material, one end of the first cylinder 3 is connected with the flat flame burner 2, the combustion plane 207 is arranged in the first cylinder 3, and the first cylinder 3 is provided with a plurality of sampling ports 303 which are arranged at intervals in the axial direction of the first cylinder.

The particle trapping device 4 is communicated with the other end of the first cylinder 3, and a multi-stage sampling film is arranged in the particle trapping device 4 and used for collecting particles in the combustion flue gas of the flat flame burner 2.

In the use process of the flat flame combustion experimental device 100, before the test, compressed air is firstly used for blowing off the pipeline of the flat flame combustion experimental device 100, and whether the tightness of the pipeline is qualified is checked. When the device pipeline is purged and the tightness is qualified, before ignition, the sampling films are weighed by an electronic balance, each level of sampling film is weighed twice, the data is an effective value when the error of the two times is within a reasonable range, and the weighing data is recorded. And the ambient air flow is ensured to be stable in the weighing process, and the ambient temperature is constant, so that the ambient error is reduced. Simultaneously, the first air inlet 201, the second air inlet 202 and the third air inlet 203 are all filled with nitrogen to discharge other gases in the pipeline, so that the other gases in the pipeline are prevented from interfering with the sampling of the sampling film, and the accuracy of the detection result is affected.

Drying biomass powder in a dryer 9 to remove water, conveying the dried biomass powder into a feeder 10, and adding pulverized coal into the feeder 10 to mix with the dried biomass powder;

nitrogen and oxygen are introduced into the first air inlet 201 according to a first preset proportion, carbon monoxide and ammonia are introduced into the second air inlet 202 according to a second preset proportion, coal dust and biomass powder in the nitrogen carrying feeder 10 are introduced into the third air inlet 203, and then the flat flame burner 2 is ignited, so that flame is combusted on the combustion plane 207, wherein the sizes of the first preset proportion and the second preset proportion can be adjusted according to specific requirements of a test.

In the combustion process of the flat flame burner 2, as the first cylinder 3 is made of transparent materials, the flame form of the flat flame burner 2 in the combustion process is observed by using the first cylinder 3, the smoke after the flat flame burner 2 is combusted is sampled through the sampling port 303 on the first cylinder 3, and the components in the sampled smoke are analyzed by using the smoke analyzer, so that the gas molecular components in the smoke after the mixed combustion of ammonia, coal and biomass are obtained. Particles sampled in each stage of sampling films are detected by an impact dust particle classifier ELPI to detect the changes of elements, morphology and content in the flue gas.

Therefore, in the flat flame combustion experimental device 100 of the embodiment of the invention, the form of the combustion flame of the ammonia, the coal and the biomass on the flat flame burner 2 is observed through the first cylinder 3, the components of gas molecules in the smoke after the combustion of the ammonia, the coal and the biomass are detected through the sampling port 303, and the chemical analysis or the specific gravity analysis of the particulate matters in the smoke is carried out through the particulate matters trapping device 4, so that the combustion mechanism and the emission characteristic of the ammonia, the coal and the biomass on the flat flame burner 2 can be explored, and the device can be used for clarifying the interaction of the mixed combustion of the ammonia, the coal and the biomass.

Accordingly, the flat flame combustion experiment device 100 of the embodiment of the present invention can obtain the combustion mechanism and emission characteristics of the ammonia coal biomass on the flat flame burner 2 for elucidating the interaction between the mixed combustion of the ammonia coal biomass.

In some embodiments, the number of the first air outlets 204 and the second air outlets 205 is plural, and the plural first air outlets 204 and the plural second air outlets 205 are disposed on the combustion plane 207 at intervals.

For example, as shown in fig. 1 and 2, the flat flame burner 2 includes a housing, a plurality of first steel pipes, a plurality of second steel pipes, and a third steel pipe. The first steel pipes and the second steel pipes are arranged in the shell and are connected with the shell, one port of each first steel pipe is communicated with the first air inlet 201, the other port of each first steel pipe is provided with a first air outlet 204, one port of each second steel pipe is communicated with the second air inlet 202, the other port of each second steel pipe is provided with a second air outlet 205, the third steel pipe is inserted on the shell and is coaxial with the shell, one port of each third steel pipe is provided with a third air inlet 203, and the other port of each third steel pipe is provided with a third air outlet 206.

In some embodiments, the plurality of sampling ports 303 comprises a first portion 301 and a second portion 302, the first portion 301 being disposed closer to the combustion plane 207 than the second portion 302 in the axial direction of the first barrel 3, each of the first portion 301 and the second portion 302 comprising a plurality of sampling ports 303 therein, wherein the spacing of any adjacent two sampling ports 303 in the first portion 301 is less than the spacing of any adjacent two sampling ports 303 in the second portion 302.

For example, as shown in fig. 2, the first portion 301 includes five sampling ports 303 arranged at intervals, and the second portion 302 includes sampling ports 303 arranged at three intervals. It will be appreciated that since the second portion 302 is disposed further from the combustion plane 207 than the first portion 301, in the first barrel 3, the smoke content at the second portion 302 is lower than that at the first portion 301, and by making the spacing between any two adjacent sampling ports 303 in the first portion 301 smaller than that between any two adjacent sampling ports 303 in the second portion 302, a plurality of samples can be sampled at the position where the smoke content is high, and a small number of samples can be sampled at the position where the smoke content is low, so that the sampling ports 303 are distributed reasonably, which is advantageous for improving the sampling efficiency.

Optionally, the plurality of sampling ports 303 in the first portion 301 are evenly spaced.

For example, the sampling ports 303 may have a diameter of 3mm and the spacing between any two adjacent sampling ports 303 in the first portion 301 may be 10mm. By uniformly and alternately arranging the plurality of sampling ports 303 in the first portion 301, the sampling of the smoke generated after the combustion of the flat flame burner 2 has a certain rule, so that the components in the smoke after the sampling can be conveniently explored.

Optionally, the plurality of sampling ports 303 in the second portion 302 are evenly spaced.

For example, the sampling ports 303 may have a diameter of 3mm and the spacing between any two adjacent sampling ports 303 in the second portion 302 may be 15mm. By uniformly and alternately arranging the plurality of sampling ports 303 in the second portion 302, the sampling of the smoke generated after the combustion of the flat flame burner 2 has a certain rule, so that the components in the smoke after the sampling can be conveniently explored.

In some embodiments, the flat flame combustion experimental device 100 according to the embodiment of the present invention further includes a water cooling device 5, the water cooling device 5 is connected to the flat flame burner 2, the water cooling device 5 is provided with a cooling cavity 501, and a first water inlet 502 and a first water outlet 503 which are communicated with the cooling cavity 501, and the water cooling device 5 is used for cooling the flat flame burner 2.

For example, as shown in fig. 2, circulating water enters the cooling cavity 501 through the first water inlet 502, exchanges heat with the flat flame burner 2, and then flows out through the first water outlet 503. It will be appreciated that the flat flame burner 2 will have a temperature above 1200 c during combustion. Therefore, in order to prevent the flat flame burner 2 from burning out, the water cooling device 5 is arranged to cool the flat flame burner 2 by circulating water, which is beneficial to improving the working reliability of the flat flame burner 2 in the embodiment of the invention.

In some embodiments, the flat flame combustion experimental device 100 of the embodiment of the invention further includes the heat tracing band 6, the heat tracing band 6 surrounds the particulate matter trapping device 4, and the heat tracing band 6 is used for heating the sampling film to 100-110 ℃, so that inaccurate sampling components on the sampling film caused by condensation of water vapor on the sampling film in the test process can be effectively prevented, and further, the working reliability of the flat flame combustor 2 of the embodiment of the invention is improved.

In some embodiments, the flat flame combustion experimental device 100 according to the embodiment of the invention further comprises a heating pipe 7, the heating pipe 7 comprises an inner pipe 701 and an outer pipe 702 which are arranged at intervals in the inner-outer direction, a heating cavity 703 is defined between the inner pipe 701 and the outer pipe 702, a fourth air inlet 7011 and a fourth air outlet 7012 are formed in the inner pipe 701, a second water inlet 7021 and a second water outlet 7022 which are communicated with the heating cavity 703 are formed in the outer pipe 702, and the fourth air inlet 7011 is arranged in the first cylinder 3.

For example, as shown in fig. 1, in use, circulating water is first introduced into the heating chamber 703 through the second water inlet 7021, the water in the heating chamber 703 is heated to boiling by the heat of combustion of the flat flame burner 2, and then discharged through the second water outlet 7022, so that the water in the heating chamber 703 is always in a boiling state. The circulation water flow rate is adjusted according to the boiling degree of the water in the heating chamber 703, and the greater the boiling degree, the greater the circulation water flow rate. When the smoke gas after being burned by the flat flame burner 2 enters the inner tube through the fourth air inlet 7011, boiling water in the heating cavity 703 can heat the smoke gas flowing through the inner tube, so that the smoke gas can be effectively prevented from being condensed to influence the component content of the smoke gas, and the accuracy of the test result of the flat flame combustion experimental device 100 is improved.

In some embodiments, the flat flame combustion experiment device 100 according to the embodiment of the present invention further includes a filter 8, wherein the filter 8 is disposed between the heating pipe 7 and the particulate matter trapping device 4, and the flue gas discharged from the heating pipe 7 enters the particulate matter trapping device 4 after being filtered by the filter 8. It can be understood that the particles sampled by the sampling film are generally nano-sized, and the flat flame combustion experimental device 100 in the embodiment of the invention can effectively filter out large particle products in the flue gas exhausted by the fourth air outlet 7012 by arranging the filter 8, so as to avoid the influence on the accuracy of the detection result due to the interference of the size of the particles sampled by the sampling film.

Alternatively, the particulate matter trapping device 4 is an impact dust particle sizer ELPI, and the sampling film is an ELPI film.

The method for using the flat flame combustion experiment device 100 according to the embodiment of the present invention, which is based on the flat flame combustion experiment device 100 described in any one of the above embodiments, includes the following steps:

before ignition, weighing the sampling film, recording weighing data, ensuring that ambient air flow is stable and the ambient temperature is constant in the weighing process, and simultaneously introducing nitrogen into the first air inlet 201, the second air inlet 202 and the third air inlet 203 to discharge other gases in the pipeline;

drying biomass powder in a dryer 9 to remove water, conveying the dried biomass powder into a feeder 10, and adding pulverized coal into the feeder 10 to mix with the dried biomass powder;

nitrogen and oxygen are introduced into a first air inlet 201 according to a first preset proportion, carbon monoxide and ammonia are introduced into a second air inlet 202 according to a second preset proportion, coal dust and biomass in a nitrogen carrying feeder 10 are introduced into a third air inlet 203, and then the flat flame burner 2 is ignited;

observing the flame form of the flat flame burner 2 in the combustion process, sampling the smoke after the flat flame burner 2 burns through a sampling port 303 on the first cylinder 3, and analyzing the components of the sampled smoke by using a smoke molecular detector;

and detecting smoke particles in each stage of sampling films by using an impact dust particle classifier ELPI so as to detect the change of elements, morphology and content in the smoke.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (9)

1. A flat flame combustion experiment device for mixed combustion of ammonia coal biomass, which is characterized by comprising:

a support (1);

the dryer (9) and the feeder (10) are arranged on the supporting frame (1), and the dryer (9) is communicated with the feeder (10) so as to convey dried biomass powder to the feeder (10);

the flat flame burner (2) is arranged on the support frame (1), the flat flame burner (2) is provided with a first air inlet (201), a plurality of first air outlets (204) communicated with the first air inlet (201), a second air inlet (202), a plurality of second air outlets (205) communicated with the second air inlet (202), a third air inlet (203) and a plurality of third air outlets (206) communicated with the third air inlet (203), the flat flame burner (2) is also provided with a combustion plane (207), a plurality of first air outlets (204), a plurality of second air outlets (205) and a plurality of third air outlets (206) are all arranged on the combustion plane (207), and the feeder (10) is communicated with the first air inlet (201) so as to convey pulverized coal and biomass powder to the flat flame burner (2);

the first cylinder body (3), the first cylinder body (3) is made of transparent materials, one end of the first cylinder body (3) is connected with the flat flame burner (2), the combustion plane (207) is arranged in the first cylinder body (3), and a plurality of sampling ports (303) which are arranged at intervals are arranged on the first cylinder body (3) in the axial direction; and

the particle trapping device (4), particle trapping device (4) with the other end intercommunication of first barrel (3), be equipped with multistage sampling membrane in particle trapping device (4), the sampling membrane is used for gathering particle in the flat flame combustor (2) burning flue gas.

2. The flat flame combustion experiment device for the mixed combustion of ammonia coal biomass according to claim 1, wherein a plurality of the sampling ports (303) comprise a first portion (301) and a second portion (302), the first portion (301) being disposed more adjacent to the combustion plane (207) than the second portion (302) in the axial direction of the first cylinder (3), the first portion (301) and the second portion (302) each comprising a plurality of the sampling ports (303);

wherein the spacing between any two adjacent sampling ports (303) in the first portion (301) is smaller than the spacing between any two adjacent sampling ports (303) in the second portion (302).

3. The flat flame combustion experiment device for the mixed combustion of ammonia coal biomass according to claim 2, wherein a plurality of the sampling ports (303) in the first portion (301) are uniformly spaced and/or a plurality of the sampling ports (303) in the second portion (302) are uniformly spaced.

4. The flat flame combustion experimental device for mixed combustion of ammonia coal biomass according to claim 1, further comprising a water cooling device (5), wherein the water cooling device (5) is arranged on the flat flame burner (2), a cooling cavity (501), a first water inlet (502) and a first water outlet (503) which are communicated with the cooling cavity (501) are arranged on the water cooling device (5), and the water cooling device (5) is used for cooling the flat flame burner (2).

5. The flat flame combustion experiment device for mixed combustion of ammonia coal biomass according to claim 1, further comprising a heat tracing band (6), the heat tracing band (6) surrounding the particulate matter trapping device (4), the heat tracing band (6) being used for heating the sampling membrane to 100-110 ℃.

6. The flat flame combustion experimental device for mixed combustion of ammonia coal biomass according to claim 1, further comprising a heating pipe (7), wherein the heating pipe (7) comprises an inner pipe (701) and an outer pipe (702) which are arranged at intervals in the inner-outer direction, a heating cavity (703) is defined between the inner pipe (701) and the outer pipe (702), a fourth air inlet (7011) and a fourth air outlet (7012) are formed in the inner pipe (701), a second water inlet (7021) and a second water outlet (7022) which are communicated with the heating cavity (703) are formed in the outer pipe (702), and the fourth air inlet (7011) is arranged in the first cylinder (3).

7. The flat flame combustion experimental device for mixed combustion of ammonia coal biomass according to claim 6, further comprising a filter (8), wherein the filter (8) is arranged between the heating pipe (7) and the particulate matter trapping device (4), and flue gas discharged from the heating pipe (7) enters the particulate matter trapping device (4) after being filtered by the filter (8).

8. The flat flame combustion experiment device for mixed combustion of ammonia coal biomass according to claim 1, wherein the particulate matter trapping device (4) is an impact dust particle classifier ELPI.

9. A method of using a flat flame combustion experiment device for mixed combustion of ammonia coal biomass, the method being based on the flat flame combustion experiment device for mixed combustion of ammonia coal biomass as claimed in any one of claims 1-8, characterized by comprising the steps of:

before ignition, weighing the sampling film, recording weighing data, ensuring that ambient air flow is stable and the ambient temperature is constant in the weighing process, and simultaneously introducing nitrogen into the first air inlet (201), the second air inlet (202) and the third air inlet (203) to discharge other gases in a pipeline;

drying biomass powder in a dryer (9) to remove water, conveying the dried biomass powder into a feeder (10), and adding pulverized coal into the feeder (10) to mix with the dried biomass powder;

introducing nitrogen and oxygen into the first air inlet (201) according to a first preset proportion, introducing carbon monoxide and ammonia into the second air inlet (202) according to a second preset proportion, introducing pulverized coal and biomass powder in the nitrogen carrying feeder (10) into the third air inlet (203), and then igniting the flat flame burner (2);

observing the flame form of the flat flame burner (2) in the combustion process, sampling the smoke after the combustion of the flat flame burner (2) through the sampling port (303), and analyzing the components in the sampled smoke by using a smoke molecularly instrument;

and (3) carrying out chemical analysis or specific gravity analysis on the smoke particles in the sampling films of each stage by using an impact type dust particle classifier ELPI so as to detect the change of elements, morphology and content in the smoke.

Images