Hydrogen micro-mixing low-nitrogen burner added with SiO2 particles to strengthen radiation heat dissipation

Abstract

The invention discloses a hydrogen micro-mixing low-nitrogen combustor with SiO2 particles added for strengthening radiation heat dissipation, and belongs to the technical field of industrial boiler gas combustion, the hydrogen micro-mixing low-nitrogen combustor comprises a protective shell, a micro-mixing combustion unit, a SiO2 particle conveying unit and a central on-duty diffusion combustion unit, the protective shell comprises an upper shell body, a middle shell body and a lower shell body, the upper shell body is installed on the middle shell body, and the lower shell body is installed on the lower shell body; the middle shell is mounted on the lower shell; the micro-mixing combustion units are radially and uniformly mounted on the protective shell in a penetrating manner; the central on-duty diffusion combustion unit penetrates through the center of the protective shell; the SiO2 particle conveying unit is radially and uniformly mounted on the protective shell in a penetrating manner, and the SiO2 particle conveying unit is mounted between the micro-mixing combustion unit and the central on-duty diffusion combustion unit. According to the hydrogen micro-mixing low-nitrogen burner with the SiO2 particles added for strengthening radiation heat dissipation, the problems that in the prior art, NOx emission is high, flame stability is poor, and tempering is likely to happen are solved.

Description

Technical Field

[0001] This invention relates to the field of industrial boiler gas combustion technology, and in particular to a hydrogen micro-mixing low-NOx burner with added SiO2 particles to enhance radiative heat dissipation. Background Technology

[0002] Hydrogen, as a widely available, zero-carbon-emission, flexible, and efficient green and clean energy source, has diverse applications. It can be used directly as a final fuel or as an energy carrier participating in energy conversion and storage in multiple fields. It is one of the important carriers for achieving the low-carbon transformation of the energy system, helping to promote deep decarbonization in the power, industry, transportation, and construction sectors. However, the combustion of pure hydrogen is prone to backfire and NO2. x The high emissions, coupled with the inherent combustion instability of H2 under lean combustion conditions, have constrained the large-scale development of hydrogen fuel.

[0003] With increasing environmental awareness regarding carbon emission reduction, hydrogen has attracted significant interest as an alternative fuel for industrial boilers. However, the non-luminous flame of hydrogen differs from the bright flame of hydrocarbon fuels such as natural gas. Pure hydrogen does not produce soot particles during combustion, resulting in a weaker flame radiation characteristic, a higher flame temperature, and reduced NO2 production. x Emissions are difficult to manage. In recent years, although micro-mixing combustion technology has effectively suppressed hydrogen backfire and achieved uniform heat load distribution through multi-array microchannel structures, making it one of the most promising hydrogen combustion technologies, it still cannot effectively improve the weak flame radiation, high temperature, and NO emission issues associated with hydrogen combustion. x The core problem is high emissions. Therefore, by introducing solid particles into the hydrogen micro-mixer, the blackbody radiation effect of the solid particles can be used to enhance flame heat dissipation and reduce flame temperature, thereby significantly reducing NO emissions from the hydrogen flame. x This will enable the safe, efficient, and low-emission application of pure hydrogen fuel. Summary of the Invention

[0004] The purpose of this invention is to provide a hydrogen micro-mixing low-NOx burner with added SiO2 particles to enhance radiative heat dissipation, overcoming the NOx content in existing technologies. x It has problems such as high emissions, poor flame stability, and a tendency to backfire.

[0005] To achieve the above objectives, the present invention provides a hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation, comprising a protective shell, a micro-mixing combustion unit, a SiO2 particle delivery unit, and a centrally monitored diffusion combustion unit. The protective shell comprises an upper shell, a middle shell, and a lower shell, wherein the upper shell is mounted on the middle shell, and the middle shell is mounted on the lower shell. The micro-mixing combustion unit is radially and uniformly installed through the protective shell; the central duty diffusion combustion unit is installed through the center of the protective shell; the SiO2 particle conveying unit is radially and uniformly installed through the protective shell, and the SiO2 particle conveying unit is installed between the micro-mixing combustion unit and the central duty diffusion combustion unit.

[0006] Preferably, the micro-hybrid combustion unit has a multi-stage radial arrangement structure, including an independent gas cylinder, an independent air cylinder, and an air cooling sleeve. The bottom of the independent gas cylinder is installed on the inner surface of the bottom of the lower housing, and the top of the independent gas cylinder is connected to the top of the lower housing through a lower honeycomb fixing plate. A second through hole is provided on the lower honeycomb fixing plate. A uniform perforated plate is provided inside the independent gas cylinder, and a first through hole is provided on the uniform perforated plate. A gas inlet is provided at the bottom of the independent gas cylinder.

[0007] Preferably, the independent air cylinder is installed on the upper surface of the lower honeycomb fixing plate inside the middle shell, and the top of the independent air cylinder is connected to the top of the middle shell through the upper honeycomb fixing plate. The upper honeycomb fixing plate is provided with a third through hole and an air plate through hole, both of which are located inside the air cooling sleeve.

[0008] Preferably, the independent air cylinder is provided with a fuel micro-mixing injection pipe inside, and the top of the fuel micro-mixing injection pipe is provided with premixing micro-holes radially and uniformly; the bottom of the fuel micro-mixing injection pipe is fixedly installed on the second through hole of the lower honeycomb fixing plate.

[0009] Preferably, the air cooling sleeve is installed on the upper surface of the upper honeycomb fixing plate inside the upper housing, and the top of the air cooling sleeve has n fourth through holes, where 7≤n≤25. Air sidewall perforations are uniformly opened on the side surface of the air cooling sleeve; a multi-array micro-mixing injection pipe is fixedly sleeved in the fourth through hole and the third through hole, and the fuel micro-mixing injection pipe is sleeved inside the multi-array micro-mixing injection pipe, with premixing micropores disposed inside the multi-array micro-mixing injection pipe.

[0010] Furthermore, a certain length of gas / air premixing section is left between the multi-array micro-mixing nozzle and the fuel micro-mixing nozzle, so that the gas is ejected at high speed through the premixing micro-holes on the side wall of the fuel micro-mixing nozzle in the form of cross-jet collision. The gas is fully mixed with the surrounding oxidant in the premixing section through the conical blunt body structure, and forms an ideal and uniform premixed jet gas at the outlet of the multi-array micro-mixing nozzle.

[0011] Preferably, the micro-hybrid combustion unit further includes an air inlet cylinder, which penetrates the middle shell and is connected to the outer surface of the independent air cylinder. A branch pipe is installed on the air inlet cylinder, and the air inlet cylinder communicates with the interior of the upper shell through the branch pipe.

[0012] Preferably, the SiO2 particle conveying unit includes an air conveying cylinder and a SiO2 particle conveying pipe, wherein the air conveying cylinder is installed on the lower surface of the lower housing; and the SiO2 particle conveying pipe penetrates the protective housing and is connected to the air conveying cylinder.

[0013] Furthermore, the SiO2 particle delivery pipes are uniformly arranged radially around the micro-mixing combustion unit and the centrally controlled diffusion combustion unit. The air inlet of the air delivery cylinder is connected to the SiO2 feed bottle and the air compressor. The SiO2 is directionally dispersed by the pneumatic delivery of the air compressor. The SiO2 particle size ranges from 10 to 250 μm, the mass addition is 0.1% to 5%, and the pneumatic delivery speed of the air compressor is 18 to 25 m / s. This effectively delivers the SiO2 particles to the micro-mixing small flame array at the top of the device, achieving high-temperature flue gas / particle contact, while optimizing the particle size concentration and spatial distribution to enhance flame radiative heat dissipation.

[0014] Preferably, the central duty diffusion combustion unit includes a duty gas pipe, a central air sleeve, and an air swirl vane. The central air sleeve is installed through the center of the protective shell. The duty gas pipe is sleeved inside the central air sleeve. The duty gas pipe and the central air sleeve are connected through the air swirl vane. The air swirl vane is coaxially fitted with the duty gas pipe, and the end face of the air swirl vane is flush with the top outlet of the central air sleeve.

[0015] Furthermore, the centrally operated diffusion combustion unit adopts diffusion combustion. Air enters through the central air sleeve, flows through the air swirl vanes, and ignites with the gas passing through the operational gas pipe at the burner outlet, forming a central swirling diffusion combustion flame. This maintains a stable high-temperature environment and provides a stable ignition heat source for the surrounding micro-mixed combustion units. Through the interaction between swirling entrainment and flames, stable ignition and combustion of pure hydrogen / high hydrogen-doped gas in the micro-mixed combustion units are achieved. At the same time, the radial swirling motion of the gas expands the distribution space of micron-sized SiO2 particles, which is beneficial for solid particles to participate in the micro-mixed small flame array and improve the radiative heat dissipation characteristics of the hydrogen flame.

[0016] Therefore, this invention employs the aforementioned hydrogen micro-mixing low-NOx burner with added SiO2 particles to enhance radiative heat dissipation, overcoming the limitations of existing technologies in terms of NO... x It has problems such as high emissions, poor flame stability, and a tendency to backfire.

[0017] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: (1) This invention effectively enhances the thermal radiation characteristics of a pure hydrogen / hydrogen-rich gas flame by adding micron-sized SiO2 particles, thereby reducing the flame temperature and suppressing thermal NO.x The formation of SiO2 particles is facilitated by their easy availability and chemical inertness. They do not participate in chemical reactions and have minimal impact on fuel combustion. Furthermore, the stabilizing effect of the diffusion flame in the centrally operated diffusion combustion unit addresses the combustion oscillations and instability issues commonly found in pure hydrogen flames.

[0018] (2) The present invention features millimeter-level multi-array micro-mixing nozzles arranged circumferentially on the outlet plane. The clusters of independent small flames replace the traditional large flames, resulting in uniform heat load, reduced local high-temperature hot spots, and effective reduction of thermal NO. x The premixed micro-orifice cross-jet structure enables efficient mixing of gases within the multi-array micro-mixing nozzle, forming a uniform high-speed jet at the outlet of this invention, reducing the risk of backfire and improving overall safety and reliability.

[0019] (3) The hydrogen flame of the present invention has a fast propagation speed and the flame is closer to the outlet, which makes it easy to burn the head of the device. Adding SiO2 particles reduces the overall flame temperature, which is more conducive to extending the service life and meeting the long-term operation requirements.

[0020] (4) The present invention sets up a reasonable arrangement of three-unit coupling structure, which enables the swirling flame of the central duty diffusion combustion unit to entrain the micro-mixing small flame cluster of the micro-mixing combustion unit, and effectively delivers SiO2 particles to the micro-mixing small flame array through the air swirling plate, so as to achieve good contact between high temperature flue gas and particles, while optimizing particle size concentration and spatial distribution, so as to achieve the ideal effect of enhancing flame radiation heat dissipation.

[0021] (5) The micro-mixing combustion unit and the central duty diffusion combustion unit of the present invention are respectively equipped with an independent gas supply module and an oxidant gas distribution unit to realize independent control of gas flow, thereby generating a micro-mixing array flame cluster with spatial symmetry, and avoiding the impact of local unit failure on the overall combustion process, thus realizing flexible distribution of thermal power.

[0022] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to the present invention. Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of a hydrogen micro-mixing low-NOx burner with added SiO2 particles to enhance radiative heat dissipation according to the present invention. Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 yes Figure 3 Enlarged schematic diagram of the structure at point B; Figure 5This is a schematic diagram of the internal structure of an embodiment of a hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to the present invention. Figure 6 This is a schematic diagram of the bottom structure of an embodiment of a hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to the present invention. Figure 7 This is a schematic diagram of the air cooling sleeve structure of an embodiment of a hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to the present invention.

[0024] Figure Labels 1. Protective outer shell; 101. Upper shell; 102. Middle shell; 103. Lower shell; 2. Micro-mixing combustion unit; 201. Independent gas cylinder; 202. Gas inlet; 203. Uniform orifice plate; 204. Lower honeycomb fixing disc; 205. Independent air cylinder; 206. Fuel micro-mixing nozzle; 2061. Premixed micro-orifice; 207. Air inlet cylinder; 2071. Branch pipe; 208. Air cooling sleeve; 2081. Air sidewall perforation; 209. Upper honeycomb fixing disc; 2091. Air disc through hole; 210. Multi-array micro-mixing nozzle; 3. SiO2 particle delivery unit; 301. Air delivery cylinder; 302. SiO2 particle delivery pipe; 4. Central duty diffusion combustion unit; 401. Duty gas pipe; 402. Central air sleeve; 403. Air swirl vane. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Example 1 like Figure 1As shown, this embodiment is a laboratory-scale multi-element micro-mixed gas burner, which can be used for experimental research on the combustion characteristics of pure hydrogen / high-proportion hydrogen-blended natural gas (designed operating condition: hydrogen calorific value ratio ≥70%, outlet NO). x <30mg / Nm 3 This invention provides a hydrogen micro-mixing low-NOx burner with SiO2 particles to enhance radiative heat dissipation, comprising a protective shell 1, a micro-mixing combustion unit 2, a SiO2 particle conveying unit 3, and a centrally monitored diffusion combustion unit 4. The protective shell 1 includes an upper shell 101, a middle shell 102, and a lower shell 103. The upper shell 101 is mounted on the middle shell 102, and the middle shell 102 is mounted on the lower shell 103.

[0028] The micro-mixing combustion unit 2 is radially and uniformly installed through the protective housing 1; the centrally positioned diffusion combustion unit 4 is installed through the center of the protective housing 1, with a center distance of 65mm between the centrally positioned diffusion combustion unit 4 and the micro-mixing combustion unit 2. The SiO2 particle conveying unit 3 is radially and uniformly installed through the protective housing 1, and the SiO2 particle conveying unit 3 is installed between the micro-mixing combustion unit 2 and the centrally positioned diffusion combustion unit 4.

[0029] like Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the micro-hybrid combustion unit 2 has a multi-stage radial arrangement structure, including an independent gas cylinder 201, an independent air cylinder 205, and an air cooling sleeve 208. The bottom of the independent gas cylinder 201 is installed on the inner surface of the bottom of the lower housing 103, and the top of the independent gas cylinder 201 is connected to the top of the lower housing 103 through a lower honeycomb fixing plate 204. A second through hole is provided on the lower honeycomb fixing plate 204. A uniform perforated plate 203 is provided inside the independent gas cylinder 201, and a first through hole is provided on the uniform perforated plate 203. A gas inlet 202 is provided at the bottom of the independent gas cylinder 201.

[0030] An independent air cylinder 205 is installed on the upper surface of the lower honeycomb fixing plate 204 inside the middle shell 102. The top of the independent air cylinder 205 is connected to the top of the middle shell 102 through the upper honeycomb fixing plate 209. The upper honeycomb fixing plate 209 is provided with a third through hole and an air plate through hole 2091. Both the third through hole and the air plate through hole 2091 are located inside the air cooling sleeve 208.

[0031] The independent air cylinder 205 is equipped with a fuel micro-mixing nozzle 206. The top of the fuel micro-mixing nozzle 206 is radially and uniformly provided with premixing micro-holes 2061, and the diameter of the premixing micro-holes 2061 is 0.6mm. The bottom outer surface of the fuel micro-mixing nozzle 206 is fixedly installed on the second through hole of the lower honeycomb fixing plate 204.

[0032] An air cooling sleeve 208 is installed inside the upper housing 101 on the upper surface of the honeycomb fixing plate 209. The top of the air cooling sleeve 208 has n fourth through holes, where 7 ≤ n ≤ 25; in this embodiment, the number of fourth through holes is 19. Air sidewall perforations 2081 are uniformly formed on the side surface of the air cooling sleeve 208. A multi-array micro-mixing nozzle 210 is fixedly fitted inside the fourth and third through holes. A fuel micro-mixing nozzle 206 is fitted inside the multi-array micro-mixing nozzle 210. Premixing micro-holes 2061 are disposed inside the multi-array micro-mixing nozzle 210. The number of fourth through holes, third through holes, second through holes, multi-array micro-mixing nozzle 210, and fuel micro-mixing nozzle 206 is the same, all being 19.

[0033] A certain length of gas / air premixing section is left between the multi-array micro-mixing nozzle 210 and the fuel micro-mixing nozzle 206, so that the gas is ejected at high speed through the premixing micro-holes 2061 on the side wall of the fuel micro-mixing nozzle 206 in the form of cross-jet collision, and is fully mixed with the surrounding oxidant in the gas / air premixing section, forming an ideal and uniform premixed jet gas at the outlet of the multi-array micro-mixing nozzle 210.

[0034] like Figure 3 As shown, the micro-hybrid combustion unit 2 also includes an air inlet cylinder 207, which penetrates the middle housing 102 and is connected to the outer surface of the independent air cylinder 205. A branch pipe 2071 is installed on the air inlet cylinder 207, and the air inlet cylinder 207 communicates with the interior of the upper housing 101 through the branch pipe 2071.

[0035] like Figure 2 , Figure 5 and Figure 6 As shown, the SiO2 particle conveying unit 3 includes an air conveying cylinder 301 and a SiO2 particle conveying pipe 302. The air conveying cylinder 301 is installed on the lower surface of the lower housing 103. The SiO2 particle conveying pipe 302 penetrates the protective housing 1 and is connected to the air conveying cylinder 301. In this embodiment, the number of SiO2 particle conveying pipes 302 is 8.

[0036] The SiO2 particle delivery pipes 302 are uniformly arranged radially around the micro-mixing combustion unit 2 and the centrally monitored diffusion combustion unit 4. The air inlet of the air delivery cylinder 301 is connected to the SiO2 feed bottle and the air compressor. The SiO2 is directionally dispersed by the air force of the air compressor. The SiO2 particle size range is 10~250μm, the mass addition amount is 0.1~5%, and the air compressor's pneumatic delivery speed is 18~25m / s. This effectively delivers the SiO2 particles to the micro-mixing small flame array at the top of the device, achieving high-temperature flue gas / particle contact, while optimizing particle size concentration and spatial distribution to enhance flame radiation heat dissipation.

[0037] like Figure 2 , Figure 6 As shown, the centrally controlled diffusion combustion unit 4 includes a control gas pipe 401, a central air sleeve 402, and air swirl vanes 403. The central air sleeve 402 is installed through the center of the protective housing 1. The control gas pipe 401 is fitted inside the central air sleeve 402. The control gas pipe 401 and the central air sleeve 402 are connected by the air swirl vanes 403. The air swirl vanes 403 are coaxially fitted with the control gas pipe 401, and the end face of the air swirl vanes 403 is flush with the top outlet of the central air sleeve 402. In this embodiment, the spiral angle of the air swirl vanes 403 is 45° and the number of vanes is 8.

[0038] The centrally controlled diffusion combustion unit 4 adopts diffusion combustion. Air enters through the central air sleeve 402, flows through the air swirl vane 403, and is ignited by the ignition device at the burner outlet along with the gas passing through the control gas pipe 401, forming a central swirling diffusion combustion flame. This maintains a stable high-temperature environment and provides a stable ignition heat source for the surrounding micro-mixed combustion units 2. Through the interaction between swirling entrainment and flame, the micro-mixed combustion unit 2 achieves stable ignition and combustion of pure hydrogen / high hydrogen-doped gas. At the same time, the radial swirling motion of the gas expands the distribution space of micron-sized SiO2 particles, which is beneficial for solid particles to participate in the high-temperature flame reaction zone and improve the radiative heat dissipation characteristics of the hydrogen flame.

[0039] This embodiment also includes a high-purity gas cylinder, an air compressor, and a SiO2 feeder. The high-purity gas cylinder provides the fuel gas required for the experiment, the air compressor provides the oxidant and air required for the experiment, and the SiO2 feeder provides SiO2 particles. The air delivery cylinder 301 is connected to the air compressor and the SiO2 feeder to provide SiO2 for the experiment and transport it by air. The fuel gas inlet 202 is connected to the high-purity gas cylinder to provide fuel gas to the micro-mixing combustion unit 2. The air inlet cylinder 207 is connected to the air compressor to provide oxidant to the micro-mixing combustion unit 2. The standby fuel gas pipe 401 is connected to the high-purity gas cylinder to provide fuel gas to the central standby diffusion combustion unit 4. The central air sleeve is connected to the air compressor to provide air to the central standby diffusion combustion unit 4. Based on the given equivalence ratio and fuel blending ratio, the mass flow meter controls the gas flow rate of each branch to adjust.

[0040] Working principle: In use, the air delivery cylinder 301 is connected to the air compressor and SiO2 feeder, the gas inlet 202 is connected to the high-purity gas cylinder, the air inlet cylinder 207 is connected to the air compressor, the duty gas supply pipe 401 is connected to the high-purity gas cylinder, and the central air sleeve is connected to the air compressor. Furthermore, based on the given equivalence ratio and fuel blending ratio, the mass flow meter controls the gas flow rate of each branch to adjust.

[0041] The high-purity gas cylinder and air compressor are turned on, and the gas from the high-purity gas cylinder flows to the outlet through the duty gas inlet pipe 401. At the same time, the air from the air compressor passes through the central air sleeve 402 and is radially moved at a speed of 20m / s by the air swirl vane 403. It mixes with the gas passing through the duty gas inlet pipe 401 and is ignited by the ignition device at the outlet, forming a central swirling diffusion combustion flame. This maintains a stable high-temperature environment and provides a stable ignition heat source for the surrounding micro-mixing combustion units 2.

[0042] When the high-purity gas cylinder and air compressor are turned on, the gas from the high-purity gas cylinder enters the independent gas cylinder 201 through the gas inlet 202. Under the action of the uniform orifice plate 203, the gas is uniformly introduced into the fuel micro-mixing nozzle 206 and injected into the gas / air premixing section through the premixing micro-hole 2061. At the same time, the oxidant from the air compressor flows through the air inlet cylinder 207, the branch pipe 2071 and the air side wall injection hole 2081 into the air cooling sleeve 208, and then enters the independent air cylinder 205 through the air disc through hole 2091 of the upper honeycomb fixed disc 209. Subsequently, it enters the gas / air premixing section of the multi-array micro-mixing nozzle 210 and is uniformly mixed with the gas. Finally, it passes through the multi-array micro-mixing nozzle 210 and forms multiple independent micro-mixing small flame arrays under the temperature influence of the central duty diffusion combustion unit 4 at the top of the air cooling sleeve 208.

[0043] The SiO2 feeder and air compressor are turned on, and the carrier gas transports the SiO2 particles to the outlet at a speed of 25 m / s. Under the influence of the air swirl plate 403 of the central control diffusion combustion unit 4, the SiO2 particles are effectively dispersed into the micro-mixed small flame array, achieving good contact between high-temperature flue gas and particles, while optimizing particle size concentration and spatial distribution, thus achieving the ideal effect of enhancing flame radiation heat dissipation.

[0044] Therefore, this invention employs the aforementioned hydrogen micro-mixing low-NOx burner with added SiO2 particles to enhance radiative heat dissipation, overcoming the limitations of existing technologies in terms of NO... x It has problems such as high emissions, poor flame stability, and a tendency to backfire.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A hydrogen micro-mixing low-NOx burner with added SiO2 particles to enhance radiative heat dissipation, characterized in that: It includes a protective outer shell, a micro-mixing combustion unit, a SiO2 particle conveying unit, and a centrally monitored diffusion combustion unit. The protective outer shell includes an upper shell, a middle shell, and a lower shell. The upper shell is mounted on the middle shell, and the middle shell is mounted on the lower shell. The micro-mixing combustion unit is radially and uniformly installed through the protective shell; the central duty diffusion combustion unit is installed through the center of the protective shell; the SiO2 particle conveying unit is radially and uniformly installed through the protective shell, and the SiO2 particle conveying unit is installed between the micro-mixing combustion unit and the central duty diffusion combustion unit.

2. The hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to claim 1, characterized in that: The micro-hybrid combustion unit includes an independent gas cylinder, an independent air cylinder, and an air cooling sleeve. The bottom of the independent gas cylinder is installed on the inner surface of the bottom of the lower housing. The top of the independent gas cylinder is connected to the top of the lower housing through a lower honeycomb fixing plate. A second through hole is provided on the lower honeycomb fixing plate. A uniform perforation plate is provided inside the independent gas cylinder. A first through hole is provided on the uniform perforation plate. A gas inlet is provided at the bottom of the independent gas cylinder.

3. The hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to claim 2, characterized in that: The independent air cylinder is installed on the upper surface of the lower honeycomb fixing plate inside the middle shell. The top of the independent air cylinder is connected to the top of the middle shell through the upper honeycomb fixing plate. The upper honeycomb fixing plate is provided with a third through hole and an air plate through hole.

4. A hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to claim 3, characterized in that: The independent air cylinder is equipped with a fuel micro-mixing injection pipe, and the top of the fuel micro-mixing injection pipe is radially and uniformly provided with premixing micro-holes; the bottom of the fuel micro-mixing injection pipe is fixedly installed on the second through hole of the lower honeycomb fixing plate.

5. A hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to claim 4, characterized in that: The air cooling sleeve is installed on the upper surface of the upper honeycomb fixing plate inside the upper housing. The top of the air cooling sleeve has a fourth through hole, and the side surface of the air cooling sleeve has air sidewall perforations evenly distributed. The fourth through hole and the third through hole are fitted with multi-array micro-mixing injection pipes, and the multi-array micro-mixing injection pipes are fitted with fuel micro-mixing injection pipes.

6. A hydrogen micro-mixing low-NOx burner with enhanced radiative heat dissipation by adding SiO2 particles as described in claim 5, characterized in that: The micro-hybrid combustion unit also includes an air inlet cylinder, which penetrates the middle shell and is connected to the outer surface of the independent air cylinder. A branch pipe is installed on the air inlet cylinder, and the air inlet cylinder communicates with the interior of the upper shell through the branch pipe.

7. A hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to claim 1, characterized in that: The SiO2 particle conveying unit includes an air conveying cylinder and a SiO2 particle conveying pipe. The air conveying cylinder is installed on the lower surface of the lower housing. The SiO2 particle conveying pipe penetrates the protective housing and is connected to the air conveying cylinder.

8. A hydrogen micro-mixing low-NOx burner with SiO2 particles added to enhance radiative heat dissipation according to claim 1, characterized in that: The central duty diffusion combustion unit includes a duty gas pipe, a central air sleeve, and an air swirl vane. The central air sleeve is installed through the center of the protective shell, and the duty gas pipe is sleeved inside the central air sleeve. The duty gas pipe and the central air sleeve are connected through the air swirl vane.

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