CN110410787A - A hydrogen water vapor oxygen-enriched flameless burner - Google Patents

Abstract

The invention belongs to the field of flameless burners, and specifically discloses a hydrogen water vapor oxygen-enriched flameless burner, wherein a hydrogen nozzle is connected to a combustion chamber; the first water vapor nozzle is sleeved on the outside of the hydrogen nozzle, and Connected to the combustion chamber, used to inject water vapor into the combustion chamber during the preheating stage; the primary air nozzle is sleeved on the outside of the first steam nozzle, and connected to the combustion chamber, used to inject water vapor into the combustion chamber during the preheating stage The primary air and secondary air nozzles are connected to the combustion chamber for injecting secondary air into the combustion chamber during the flameless combustion stage; the combustion chamber is used to provide space for oxygen-enriched combustion of hydrogen. The invention uses water vapor to separate the primary air from the hydrogen, which can effectively reduce the combustion rate of hydrogen, thereby improving the safety of the burner. After reaching the preset temperature, switch to the secondary air nozzle to provide oxygen to realize the hydrogen without Flame combustion can ensure a relatively uniform temperature distribution in the burner, thus avoiding the safety hazards caused by hydrogen combustion.

Description

A hydrogen water vapor oxygen-enriched flameless burner

technical field

The invention belongs to the field of flameless burners, and more specifically relates to a hydrogen-water vapor oxygen-enriched flameless burner.

Background technique

In recent years, with the rapid consumption of fossil energy by human beings, environmental problems have become increasingly serious. Nitrogen oxides produced by fossil energy combustion are one of the main causes of acid rain and PM2.5. At the same time, CO ₂ produced by fossil fuel combustion will also Exacerbate the greenhouse gas effect and have a great impact on the environment. As a new type of fuel, hydrogen has attracted much attention because of its many advantages. For example, because hydrogen has a high combustion calorific value, the energy generated by burning hydrogen is relatively high; the product after hydrogen combustion is only water, so hydrogen combustion is clean and pollution-free. ; In addition, hydrogen can be obtained directly from water and can be recycled. However, hydrogen combustion also has insurmountable disadvantages: the high calorific value of hydrogen, and the corresponding high combustion temperature, resulting in high emissions of nitrogen oxides (NOx) accompanying hydrogen combustion; the combustion rate of hydrogen is extremely fast and easy to explode, so The safety hazard of hydrogen combustion also limits the large-scale use of hydrogen.

In addition, finding a new combustion technology is another way to reduce pollutant emissions. Oxygen-enriched combustion and flameless combustion have received continuous attention in recent years. Traditional oxy-enriched combustion uses carbon dioxide instead of nitrogen to dilute oxygen, making the flue gas contain a large amount of carbon dioxide, which is beneficial to the capture and storage of carbon dioxide, and carbon dioxide has a higher heat capacity than nitrogen, so the combustion temperature is relatively low, and NOx emissions will be reduced to a certain extent. As an emerging technology, flameless combustion has the following advantages: low reaction rate, less local heat release, uniform heat flow distribution, low and uniform combustion temperature, no flame front, minimal noise, and extremely low NOx emissions. The technology that combines oxygen-enriched combustion and flameless combustion is called oxygen-enriched flameless combustion technology. This technology combines the advantages of oxygen-enriched combustion and flameless combustion, and can reduce the emission of nitrogen oxides to a greater extent.

At present, the research on flameless combustion technology has made great progress. For example, CN201310624080.3 proposes a method and system for pulverized coal oxygen-enriched flameless combustion. Improve its stability, burnout rate and radiation heat transfer; CN201410528106.9 proposes an oxygen-enriched gas flameless burner, which can organically combine flameless combustion and oxygen-enriched combustion to realize flameless combustion and optimize The temperature distribution in the furnace also reduces NOx emissions. However, the existing oxygen-enriched burners all use carbon dioxide as the oxidant diluent, while using water vapor as the diluent for hydrogen fuel can obtain high-purity water vapor flue gas, which is beneficial to trapping water in the flue gas and reducing NOx formation; at the same time However, for hydrogen, a fuel with an extremely fast combustion rate, there is currently no invention patent for a flameless burner, which limits the utilization of hydrogen, a clean energy source.

Contents of the invention

Aiming at the above defects or improvement needs of the prior art, the present invention provides a hydrogen-water vapor oxygen-enriched flameless burner, which combines the characteristics of oxygen-enriched combustion and flameless combustion itself, and its key components such as the first water vapor injection The structure and specific arrangement of the pipe, the primary air nozzle and the secondary air nozzle are researched and designed, which can realize the oxygen-enriched flameless combustion of hydrogen and effectively solve the problem of a large amount of nitrogen oxides produced during the fuel combustion process. And it can directly realize the water capture of flue gas, so it is especially suitable for the application of hydrogen combustion.

In order to achieve the above object, the present invention proposes a hydrogen water vapor oxygen-enriched flameless burner, comprising a hydrogen nozzle, a first water vapor nozzle, a primary air nozzle, a secondary air nozzle, a first heat preservation pipe, a second 2. Insulated pipes and combustion chambers, of which:

The hydrogen nozzle is connected to the combustion chamber for injecting hydrogen into the combustion chamber;

The first water vapor nozzle is sleeved on the outside of the hydrogen nozzle and connected to the combustion chamber for injecting water vapor into the combustion chamber during the preheating stage, thereby reducing the combustion rate of the hydrogen The primary air nozzle is sleeved on the outside of the first water vapor nozzle and connected to the combustion chamber for injecting a mixture of water vapor and oxygen into the combustion chamber during the preheating stage as a primary wind, so as to provide oxygen for the oxygen-enriched flaming combustion of the hydrogen; at the same time, the outlets of the first water vapor nozzle and the primary air nozzle are respectively uniformly arranged with first swirl blades and second swirl blades along the circumferential direction blades, used to drive the water vapor and the primary wind to rotate along the axis of the hydrogen nozzle with the same degree of swirl;

The secondary air nozzle is connected to the combustion chamber, and is used to inject a mixture of water vapor and oxygen into the combustion chamber as secondary air during the flameless combustion stage, so as to perform oxygen-enriched flameless combustion for the hydrogen provide oxygen;

The first insulation pipe is sleeved on the outside of the hydrogen nozzle, the first water vapor nozzle and the primary air nozzle to preheat the hydrogen, water vapor and primary air while avoiding the occurrence of the water vapor Condensation; the second thermal insulation pipe is sleeved on the outside of the secondary air nozzle for preheating the secondary air;

The combustion chamber is used to provide a space for the oxygen-enriched combustion of the hydrogen.

As a further preference, the inlet of the hydrogen nozzle is provided with an anti-temper chamber, which is used to stabilize the intake pressure of the hydrogen, thereby ensuring the safety of the combustion process, and the number of the anti-temper chamber is 1- 3.

As further preferably, the hydrogen water vapor oxygen-enriched flameless burner also includes a second water vapor pipeline, which is connected with the secondary air nozzle for passing the water vapor in the flue gas into the In the secondary air, the concentration of oxygen in the secondary air is further diluted.

As a further preference, the flue gas produced by combustion is passed into the first heat preservation pipe and the second heat preservation pipe, so as to realize waste heat recovery and utilization of the flue gas.

As a further preference, the swirl degree of the water vapor and the primary air is preferably 0.7-0.9.

As a further preference, the diameter of the primary air nozzle is 1.5 to 3 times the diameter of the hydrogen nozzle, and the diameter of the secondary air nozzle is 1 to 5 times the diameter of the hydrogen nozzle.

As a further preference, the oxygen concentration in the primary air and the secondary air is preferably 10%-50%, and in the flameless combustion stage, the oxygen concentration in the combustion chamber is preferably 2%-10%.

As a further preference, a water spraying desuperheating pipe is provided in the combustion chamber for spraying water into the combustion chamber, thereby reducing the temperature of a local high temperature area.

As a further preference, the hydrogen water vapor oxygen-enriched flameless burner also includes a blunt body arranged in the combustion chamber, and a cooling water pipeline is arranged in the blunt body for reducing the temperature of the blunt body and preheating stage, the blunt body is located at the outlet of the hydrogen nozzle to form a stable flame, and in the flameless combustion stage, the blunt body is close to the inner wall of the combustion chamber, thereby realizing flameless combustion.

As a further preference, the outlet of the secondary air nozzle is provided with 1 to 5 nozzles, and the outlet flow rate of the secondary air nozzle is adjusted by changing the number of nozzles.

Generally speaking, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:

1. The present invention can realize the flaming combustion of hydrogen in the preheating stage by sequentially setting the first water vapor nozzle and the primary air nozzle on the outside of the hydrogen nozzle, and simultaneously utilize water vapor to separate the primary air from the hydrogen, which can effectively Reduce the combustion rate of hydrogen, thereby improving the safety of the burner. After reaching the preset temperature, switch to the secondary air nozzle to provide oxygen to achieve flameless combustion of hydrogen, which can ensure a relatively uniform temperature distribution in the burner. Thereby, the potential safety hazard caused by hydrogen combustion is avoided. At the same time, the present invention uses water vapor to dilute oxygen, so that the flue gas generated by combustion is mainly water, which is beneficial to capture and reuse, and realizes near-zero emissions;

2. In particular, the present invention can ensure the safety of flaming combustion and the uniformity of flameless combustion by optimizing the diameters of the primary air nozzle and the secondary air nozzle;

3. At the same time, aiming at the characteristics of the hydrogen combustion rate being too fast and prone to explosion, the present invention can effectively control the combustion rate of hydrogen by controlling the concentration of oxygen in the primary air and secondary air and optimizing the oxygen concentration in the combustion chamber. The invention sets up an anti-tempering chamber at the inlet of the hydrogen nozzle, which can stabilize the intake pressure of hydrogen and avoid explosions caused by tempering. In addition, the invention sets a desuperheating tube in the combustion chamber, which can effectively reduce the temperature in the local high-temperature area and ensure combustion. The indoor temperature distribution is relatively uniform.

Description of drawings

Fig. 1 is the cross-sectional view of the hydrogen water vapor oxygen-enriched flameless burner constructed according to the preferred embodiment of the present invention;

Fig. 2 is the sectional view of A-A plane among Fig. 1;

Fig. 3 is a schematic diagram of a combustion system constructed using the hydrogen-water vapor oxygen-enriched flameless burner provided by the present invention.

Throughout the drawings, the same reference numerals are used to designate the same elements or structures, wherein:

1-hydrogen nozzle, 2-primary air nozzle, 3-secondary air nozzle, 4-first heat preservation pipe, 5-first water vapor nozzle, 6-blunt body, 7-first swirl blade, 7'-the second swirl vane, 8-the water spray desuperheating pipe, 9-the second heat preservation pipe, 10-the second water vapor nozzle, 11-combustion chamber, 12-anti-temper chamber, 13-hydrogen water vapor Oxygen-enriched flameless burner, 14-Oxygen flow meter, 15-Oxygen cylinder, 16-Hydrogen gas flowmeter, 17-Hydrogen gas cylinder, 18-The third booster fan, 19-The first booster fan, 20-Water catcher, 21-Hydrogen pipeline, 22-First oxygen intake pipeline, 23-Secondary air intake pipeline, 24-First water vapor intake pipeline, 25-Third water vapor intake pipeline, 26-Second water vapor Intake pipeline, 27-flue gas circulation pipeline, 28-primary air intake pipeline, 29-second oxygen intake pipeline, 30-flue gas pipeline, 31-water catch pipeline, 32-second booster fan.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

As shown in Figures 1 to 2, a preferred embodiment of the present invention provides a hydrogen water vapor oxygen-enriched flameless burner, including a hydrogen nozzle 1, a first water vapor nozzle 5, a primary air nozzle 2, a secondary air Nozzle 3, the second water vapor pipeline 10, the first insulation pipeline 4, the second insulation pipeline 9 and the combustion chamber 11, wherein:

The hydrogen nozzle 1 is connected to the combustion chamber 11 for injecting hydrogen into the combustion chamber 11. The inlet of the hydrogen nozzle 1 is provided with an anti-temper chamber 12 for stabilizing the intake pressure of hydrogen and preventing the occurrence of tempering. In order to ensure the safety of the combustion process, the number of anti-tempering chambers 12 is 1 to 3;

The first water vapor nozzle 5 is sleeved on the outside of the hydrogen nozzle 1 and connected to the combustion chamber 11 for injecting water vapor into the combustion chamber 11 during the preheating stage, thereby reducing the combustion rate of hydrogen. The outlet of the tube 5 is evenly arranged with first swirl blades 7 along the circumferential direction, which are used to drive the water vapor to rotate along the axis of the hydrogen nozzle 1;

The primary air nozzle 2 is sleeved on the outside of the first water vapor nozzle 5 and is connected to the combustion chamber 11 for injecting a mixture of water vapor and oxygen into the combustion chamber 11 during the preheating stage as the primary air to generate hydrogen gas. Oxygen-enriched flaming combustion is carried out to provide oxygen, and the outlet of the primary air nozzle 2 is evenly arranged with second swirl blades 7' along the circumferential direction, which are used to drive the primary air to rotate along the axis of the hydrogen nozzle 1 to preheat stage produces a swirling flaming flame, thereby preheating the combustion chamber 11;

The secondary air nozzle 3 is connected to the combustion chamber 11, and is used to inject a mixture of water vapor and oxygen into the combustion chamber 11 as secondary air during the flameless combustion stage, so as to provide oxygen for the oxygen-enriched flameless combustion of hydrogen. The outlet of the air nozzle 3 is provided with 1 to 5 nozzles, and the outlet flow rate of the secondary air nozzle 3 is adjusted by changing the number of nozzles. Fig. 2 is a schematic diagram showing the distribution of 5 nozzles;

The second water vapor pipeline 10 is connected with the secondary air nozzle 3, and is used to pass the water vapor in the flue gas into the secondary air, thereby diluting the concentration of oxygen in the secondary air;

The first thermal insulation pipe 4 is set on the outside of the hydrogen nozzle 1, the first water vapor nozzle 5 and the primary air nozzle 2, and is used to preheat the hydrogen, water vapor and primary air while avoiding condensation of the water vapor. The thermal insulation pipe 9 is set on the outside of the secondary air nozzle 3 and the second water vapor nozzle 10 to preheat the secondary air and water vapor while avoiding the condensation of the water vapor and passing the flue gas generated by combustion into the first In the first insulation pipeline and the second insulation pipeline, so as to realize the waste heat recovery and utilization of flue gas;

Combustion chamber 11 provides a space for oxygen-enriched combustion of hydrogen, and a water spray desuperheating pipe 8 is arranged in combustion chamber 11, which is used to spray water into combustion chamber 11, thereby reducing the temperature of local high temperature area, so as to reduce NOx in the process of hydrogen combustion generation.

Further, water vapor and primary air rotate along the axis of the hydrogen nozzle with the same swirl degree, which can delay the mixing of hydrogen and oxygen, thereby realizing clean and medium-temperature combustion of hydrogen gas. At the same time, the swirl degree of water vapor and primary air is preferably 0.7- 0.9, it can produce swirling flame combustion in the preheating stage to preheat the combustion chamber, and at the same time, it can delay the mixing of hydrogen and oxygen, reduce the combustion rate and flame temperature.

Further, the diameter of the primary air nozzle 2 is 1.5 to 3 times the diameter of the hydrogen nozzle 1, so that the primary air intake velocity is close to the hydrogen intake velocity, and after entering the combustion chamber, it is fully mixed with hydrogen to achieve swirling combustion The diameter of the secondary air nozzle 3 is 1 to 5 times the diameter of the hydrogen nozzle 1, while ensuring that the oxidant in the secondary air can be fully diluted by water vapor and its speed reaches 50m/s～150m/s, so that After the secondary air enters the combustion chamber, it can entrain a large amount of smoke to realize the oxygen-enriched flameless combustion of water vapor.

In order to reduce the combustion rate of hydrogen, thereby improving the safety of the burner, the concentration of oxygen in the primary air and secondary air is preferably 10% to 50%, and in the flameless combustion stage, the concentration of oxygen in the combustion chamber 11 is preferably 2% to 50%. 10%, so as to ensure that the combustion chamber can achieve a uniform low-oxygen atmosphere in the flameless combustion stage, so as to realize the oxygen-enriched flameless combustion of water vapor.

Further, the hydrogen water vapor oxygen-enriched flameless burner also includes a blunt body 6 arranged in the combustion chamber 11. Due to the high combustion temperature of hydrogen, a cooling water pipe is arranged inside the blunt body 6 to reduce its temperature. In the preheating stage , the blunt body 6 is located at the outlet of the hydrogen nozzle 1, and is used to form a stable flame. In the flameless combustion stage, the blunt body 6 is close to the inner wall of the combustion chamber 11, thereby realizing flameless combustion.

Utilize the combustion system that the hydrogen water vapor oxygen-enriched flameless burner provided by the present invention is constructed as shown in Figure 3, wherein the hydrogen nozzle 1 of the hydrogen water vapor oxygen-enriched flameless burner 13 is connected with the hydrogen pipeline 21, and passes hydrogen The flow meter 16 controls the hydrogen cylinder 17 to provide hydrogen; the primary air intake pipeline 28 is connected with the primary air nozzle 2 for providing primary air, while the primary air intake pipeline 28 is connected with the first oxygen intake pipeline 22 and the first oxygen intake pipeline 22 respectively. A water vapor intake pipeline 24 is connected to obtain the primary air after mixing oxygen and water vapor; the secondary air intake pipeline 23 is connected to the secondary air nozzle 3 to provide secondary air for it, while the secondary air enters The air pipeline 23 is connected with the second oxygen intake pipeline 29 and the second water vapor intake pipeline 26 respectively, and obtains secondary air by mixing oxygen and water vapor; the oxygen bottle 15 is the first oxygen intake pipeline 22 and the second oxygen intake pipeline. Gas line 29 provides oxygen, and monitors its flow value by oxygen flow meter 14; The third water vapor inlet line 25 is connected with the first water vapor nozzle 5, and is used to provide water vapor as diluent to combustion chamber 11; Combustion chamber 11, the flue gas produced enters the first water vapor intake pipeline 24, the second water vapor intake pipeline 26 and the third water vapor intake pipeline 25 through the flue gas pipeline 30 and the flue gas circulation pipeline 27, and is fed by the first The booster fan 19, the second booster fan 32 and the third booster fan 18 are pressurized to provide water vapor for the combustion chamber 11, and the remaining flue gas in the combustion chamber 11 enters the water catcher 20 through the water catcher pipeline 31 to carry out catch water.

The specific working process of the hydrogen-water vapor oxygen-enriched flameless burner provided by the present invention will be further described below.

In the preheating stage, hydrogen, water vapor and primary air are respectively introduced into the hydrogen nozzle 1, the first water vapor nozzle 5, and the primary air nozzle 2, and the blunt body 6 is placed close to the outlet of the hydrogen nozzle 1, and the water vapor And the primary wind enters the combustion chamber 11 in the form of swirling flow, burns rapidly with the hydrogen and forms a stable flame at the blunt body 6, after the temperature of the combustion chamber 11 is higher than the hydrogen self-ignition point, gradually reduce the first water vapor nozzle 5 and The flow in the primary air nozzle 2 is until closed, and the flow in the second steam nozzle 10 and the secondary air nozzle 3 is gradually increased until reaching the preset target, while the blunt body 6 is kept away from the outlet of the hydrogen nozzle 1 Make it close to the wall of the burner 11, the secondary air is jetted out at high speed through the nozzle and then enters the combustion chamber 11, entraining a large amount of smoke and mixing it with hydrogen to achieve flameless combustion. The smoke generated during the combustion process has high heat, Therefore, it can be passed into the first thermal insulation pipeline 4 and the second thermal insulation pipeline 9 for preheating hot water vapor, primary air and secondary air. In the first water vapor nozzle 5 and the second water vapor nozzle 10, the flue gas can also be mixed with oxygen to obtain primary air and secondary air, thereby realizing the enrichment of water vapor in the flue gas, and finally using the water catcher 20 to The water in the flue gas is captured.

Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be Included within the protection scope of the present invention.

Claims (10)

1. a kind of oxygen-enriched flameless burner of hydrogen vapor, which is characterized in that including hydrogen jet pipe (1), the first vapor jet pipe (5), First air jet pipe (2), Secondary Air jet pipe (3), the first utilidor (4), the second utilidor (9) and combustion chamber (11), Wherein:

The hydrogen jet pipe (1) connect with the combustion chamber (11), for spraying hydrogen to the combustion chamber (11)；

The first vapor jet pipe (5) is set in the outside of the hydrogen jet pipe (1), and connect with the combustion chamber (11), For spraying vapor to the combustion chamber (11) in warm-up phase, and then reduce the burn rate of the hydrogen；It is described primary Wind jet pipe (2) is set in the outside of the first vapor jet pipe (5), and connect with the combustion chamber (11), for preheating Stage sprays the mixed gas of vapor and oxygen as First air, to carry out richness for the hydrogen to the combustion chamber (11) Oxygen flaming combustion provides oxygen；The outlet of the first vapor jet pipe (5) and First air jet pipe (2) simultaneously is circumferentially square respectively To the first swirl vane (7) and the second swirl vane (7 ') has been evenly arranged, for driving the vapor and First air with phase Same eddy flow degree is rotated along the axis of the hydrogen jet pipe (1)；

The Secondary Air jet pipe (3) connect with the combustion chamber (11), in the flameless combustion stage to the combustion chamber (11) The mixed gas of vapor and oxygen is sprayed as Secondary Air, so that carrying out oxygen-enriched flameless combustion for the hydrogen provides oxygen；

First utilidor (4) is set in the hydrogen jet pipe (1), the first vapor jet pipe (5) and First air jet pipe (2) Outside, for preheating the hydrogen, vapor and First air, while the vapor being avoided to condense；Described second protects Warm pipeline (9) is set in the outside of the Secondary Air jet pipe (3), for preheating the Secondary Air；

The combustion chamber (11) is used to carry out oxygen-enriched combusting for the hydrogen to provide space.

2. the oxygen-enriched flameless burner of hydrogen vapor as described in claim 1, which is characterized in that the hydrogen jet pipe (1) Import is provided with anti-backfire chamber (12), for stablizing the admission pressure of the hydrogen, thus guarantee the safety of combustion process, institute The quantity for stating anti-backfire chamber (12) is 1~3.

3. the oxygen-enriched flameless burner of hydrogen vapor as claimed in claim 1 or 2, which is characterized in that the hydrogen vapor Oxygen-enriched flameless burner further includes the second vapor pipeline (10), the second vapor pipeline (10) and Secondary Air jet pipe (3) Connection for the vapor in flue gas to be passed through in the Secondary Air, and then dilutes the concentration of oxygen in the Secondary Air.

4. the oxygen-enriched flameless burner of hydrogen vapor as claimed in any one of claims 1 to 3, which is characterized in that produce burning Raw flue gas is passed through in first utilidor (4) and the second utilidor (9), to realize the waste heat recycling of the flue gas It utilizes.

5. the oxygen-enriched flameless burner of hydrogen vapor as described in claim 1, which is characterized in that the vapor and First air Eddy flow degree be preferably 0.7~0.9.

6. the oxygen-enriched flameless burner of hydrogen vapor as described in claim 1, which is characterized in that the First air jet pipe (2) Diameter be 1.5 times~3 times of hydrogen jet pipe (1) diameter, the diameter of the Secondary Air jet pipe (3) is the hydrogen jet pipe (1) 1 times of diameter~5 times.

7. the oxygen-enriched flameless burner of hydrogen vapor as described in claim 1, which is characterized in that the First air and Secondary Air The concentration of middle oxygen is preferably 10%~50%, the flameless combustion stage, and the concentration of oxygen is preferably 2% in the combustion chamber (11) ~10%.

8. the oxygen-enriched flameless burner of hydrogen vapor as described in claim 1, which is characterized in that set in the combustion chamber (11) Spray desuperheating pipe (8) are equipped with, for the water spray into the combustion chamber (11), to reduce the temperature of local high temperature zone.

9. the oxygen-enriched flameless burner of hydrogen vapor as described in claim 1, which is characterized in that the hydrogen vapor is oxygen-enriched Flameless burner further includes the bluff body (6) being arranged in the combustion chamber (11), is provided with cooling water pipe in the bluff body (6) Road, for reducing the temperature of the bluff body (6), warm-up phase, the bluff body (6) is located at the outlet of the hydrogen jet pipe (1), uses Stablize flame, flameless combustion stage in being formed, the bluff body (6) is adjacent to the combustion chamber (11) inner wall, to realize that nonflame fires It burns.

10. the oxygen-enriched flameless burner of hydrogen vapor as described in any one of claims 1 to 9, which is characterized in that described secondary The outlet of wind jet pipe (3) is provided with 1~5 spout, and the quantity by changing the spout adjusts the Secondary Air jet pipe (3) Exit velocity.