Low-nitrogen combustor

Abstract

The low-nitrogen combustor comprises a combustion chamber, one end of the combustion chamber is provided with a combustion head, the combustion head comprises a first combustion part and a second combustion part, and a plurality of inclined air holes are evenly distributed in the side wall of the first combustion part and the side wall of the second combustion part with a circle point as the axis. An air pipe, an ignition gun and a fire detection needle are arranged on the inner wall of the combustion chamber. By means of the inclined air holes, the contact area when combustion gas converges is increased, fuel is further fully combusted, generation of impurities and nitric oxide is further reduced, the multiple combustion parts are arranged, the problem that the combustion head is blocked is solved, the ignition gun, the air pipe and the fire detection needle are arranged in the combustion chamber, and the combustion efficiency is improved. The fan continuously conveys cold air into the combustion chamber, so that the temperature of the ignition gun, the air pipe and the fire detection needle is reduced, the product is more durable, and the product has the advantages of preventing blockage, prolonging the service life, reducing the manufacturing and maintenance cost and the like.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a low-NOx burner. Background Technology

[0002] With social development, environmental issues have increasingly attracted international attention. In my country, the contradiction between energy supply and demand and environmental pollution is becoming more and more prominent, and the frequency of acid rain is constantly increasing. Therefore, the country is paying increasing attention to the environmental protection industry, and new flue gas emission standards have reduced the emission levels of particulate matter, SO2, NOx, and CO. Due to the increased emission requirements imposed by national policies and the large-scale application of various fuel gases, the development of low-NOx burners has become a necessity for environmental protection, and low-NOx burners are a key core component of burners.

[0003] The existing burner head has a metal mesh on the outer layer. After the gas and air are mixed evenly in the combustion chamber, the mixed combustion gas is blown out through the metal mesh burner head by a fan and ignited by an ignition gun on the outside of the burner head.

[0004] However, after a period of use, the aforementioned metal mesh burner head will accumulate carbon deposits on its surface due to dust or debris in the combustion air and impurities in the fuel during combustion. This carbon buildup will clog the pores of the metal mesh, causing the gas concentration in the combustion chamber to gradually increase, leading to deflagration and backfire. Furthermore, the ignition gun will be damaged due to prolonged exposure to flame. Using a more heat-resistant ignition gun would increase the overall manufacturing cost of the burner. Therefore, the applicant has developed a useful design and found a solution to the above problems. The technical solution described below was developed under this background. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of traditional low-NOx burner designs and provide a product that is anti-clogging, has a longer service life, and reduces manufacturing and maintenance costs.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A low-NOx burner includes a combustion chamber, one end of which is provided with a combustion head. The combustion head includes a first combustion section and a second combustion section. The sidewalls of the first and second combustion sections are provided with a plurality of inclined air holes evenly distributed around a dot. The inner wall of the combustion chamber is provided with an air pipe, an ignition gun, and a flame probe, and is disposed on the outer wall of the first combustion section.

[0008] Preferably, the burner head has a reduced diameter section, and the reduced diameter section extends into a straight cylindrical section at the end with a smaller diameter. The interior of the straight cylindrical section and the reduced diameter section communicates with the combustion chamber.

[0009] Preferably, the first combustion section is disposed in the reduced diameter section, and the second and third combustion sections are disposed sequentially in the straight section, with the third combustion section being located away from the first combustion section.

[0010] Preferably, the fire detection needle is provided with a detection part and is disposed between the first combustion part and the second combustion part.

[0011] Preferably, the ignition gun is equipped with an ignition needle and is located at the outlet of the gas tube.

[0012] Preferably, the housing also includes a fan on one side and an air filter on the other end, and the housing has a ventilation channel.

[0013] Preferably, the ventilation duct is fixedly connected to the combustion chamber, and the combustion chamber is provided with a first gas interface and a second gas interface, the second combustion interface being fixedly connected to the gas pipe.

[0014] Beneficial effects:

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) In this utility model, the ignition needle ignites the combustion gas blown out of the ignition hole and continues to burn in the first combustion section, the second combustion section and the third combustion section, which is a primary combustion. Since the vent of the first combustion section is set on the inclined constricted section, the combustion gas sprayed from the first combustion section will intersect with the combustion gas sprayed from the second combustion section and the third combustion section to produce secondary combustion. The emission of nitrogen oxides is reduced through secondary combustion. The inclined vent increases the contact area of ​​the combustion gas when they intersect, so that the fuel is further fully burned, further reducing the generation of impurities and nitrogen oxides. In addition, multiple combustion sections are set to avoid the problem of burner head blockage, prevent backfire and deflagration, and thus extend the service life of the burner head.

[0017] (2) This utility model, by placing the ignition gun, gas pipe and flame probe in the combustion chamber, and the fan continuously delivers cold air into the combustion chamber, reduces the temperature of the ignition gun, gas pipe and flame probe, prevents the above-mentioned components from being damaged due to high temperature, and makes them more durable. At the same time, the combustion chamber also plays a role in protecting the ignition gun, gas pipe and flame probe, so that the product has the advantages of increasing service life and reducing manufacturing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a low-NOx burner according to the present invention;

[0019] Figure 2 This is a front view of a low-NOx burner according to the present invention;

[0020] Figure 3 This utility model Figure 2 A partial enlarged view A of a low-NOx burner;

[0021] Figure 4 This is a left view of a low-NOx burner according to the present invention;

[0022] Figure 5 This utility model Figure 4 A cross-sectional schematic diagram of a low-NOx burner;

[0023] The correspondence between the labels and component names in the attached figures is as follows:

[0024] Reference numerals: 1. Combustion chamber; 2. Combustion head; 3. Gas pipe; 4. Ignition gun; 5. Flame probe; 6. Fan; 7. Air filter; 8. First gas interface; 9. Second gas interface; 9.1. Housing; 21. First combustion section; 22. Second combustion section; 23. Third combustion section; 24. Gas port; 25. Reducing diameter section; 26. Straight cylinder section; 41. Ignition needle; 51. Detection section; 9.11. Ventilation duct. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0028] Reference example Figures 1 to 5A low-NOx burner includes a combustion chamber 1, with a burner head 2 at one end of the combustion chamber 1. The burner head 2 includes a first combustion section 21 and a second combustion section 22. The side walls of the first combustion section 21 and the second combustion section 22 are evenly distributed with a plurality of inclined air holes 24 centered on a dot. The inner wall of the combustion chamber 1 is provided with an air pipe 3, an ignition gun 4, and a flame probe 5, which are disposed on the outer wall of the first combustion section 21. By placing the ignition gun 4, the air pipe 3, and the flame probe 5 inside the combustion chamber 1, a fan 6 continuously delivers cold air into the combustion chamber 1 to reduce the temperature of the ignition gun 4, the air pipe 3, and the flame probe 5, preventing damage to the above-mentioned components due to high temperature and making them more durable. At the same time, the combustion chamber 1 also serves to protect the ignition gun 4, the air pipe 3, and the flame probe 5.

[0029] It is worth mentioning that the burner head 2 is provided with a reduced diameter section 25. The reduced diameter section 25 is located at the end with a smaller diameter and extends to a straight cylindrical section 26. The interior of the straight cylindrical section 26 and the reduced diameter section 25 are connected to the combustion chamber 1. The diameter of the reduced diameter section 25 is smaller at the top and larger at the bottom. The straight cylindrical section 26 allows the combustion gas to be blown out at an inclined angle through the air hole 24.

[0030] It is worth mentioning that the first combustion section 21 is located in the narrowed section 25, and the second combustion section 22 and the third combustion section 23 are sequentially located in the straight section 26. The third combustion section 23 is far away from the first combustion section 21. By setting multiple combustion sections, not only can the problem of clogging of the burner head 2 be avoided, but the contact area between the combustion gases of the second combustion section 22 and the third combustion section 23 and the first combustion section 21 is further increased, so that the fuel combustion is more complete.

[0031] It is worth mentioning that the fire detection needle 5 is equipped with a detection part 51 and is located between the first combustion part 21 and the second combustion part 22. The detection part 51 senses whether the ignition needle 41 ignites the combustion gas of the first combustion part 21, the second combustion part 22 and the third combustion part 23.

[0032] It is worth mentioning that the ignition gun 4 is equipped with an ignition needle 41, which is located at the outlet of the gas pipe 3. The ignition needle 41 ignites the combustion gas in the gas pipe 3.

[0033] It is worth mentioning that the housing 9.1 is also included. A fan 6 is provided on one side of the housing 9.1, and an air filter 7 is provided at the other end of the housing 9.1. The housing 9.1 is provided with a ventilation channel 9.11. The fan 6 continuously draws in external air into the ventilation channel 9.11, and the air filter 7 filters out particles and impurities in the air, further preventing the burner head 2 from becoming clogged.

[0034] It is worth mentioning that the ventilation duct 9.11 is connected and fixed to the combustion chamber 1. The combustion chamber 1 is equipped with a first gas interface 8 and a second gas interface 9. The second combustion interface is connected and fixed to the gas pipe 3. The gas interface can deliver natural gas or coal gas into the combustion chamber 1 or the gas pipe 3.

[0035] The working principle of this utility model is described as follows:

[0036] The combustion gas without air is supplied to the gas pipe 3. The ignition needle 41 is activated to keep the main flame burning in the gas pipe 3. The blower 6 is activated to supply a continuous supply of air into the combustion chamber 1. After the air is mixed evenly with the combustion gas in the combustion chamber 1, the mixed combustion gas is blown out from the air hole 24. When it comes into contact with the main flame, the first combustion section 21, the second combustion section 22, and the third combustion section 23 start to burn continuously. This is one combustion. The detection unit 51 senses that it has been ignited and cuts off the supply of combustion gas to the gas pipe 3.

[0037] Since the vents 24 of the first combustion section 21 are located on the inclined narrowed section 25, the combustion gases ejected from the first combustion section 21 will intersect with the combustion gases ejected from the second combustion section 22 and the third combustion section 23, resulting in secondary combustion. The emission of nitrogen oxides is reduced through secondary combustion. The inclined vents 24 increase the contact area of ​​the combustion gases during the intersection, allowing the fuel to burn more completely and further reducing the generation of impurities and nitrogen oxides.

[0038] The above design scheme can enable the product to achieve the advantages of anti-clogging, increased service life, and reduced manufacturing and maintenance costs.

[0039] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A low-NOx burner, comprising a combustion chamber (1), characterized in that: One end of the combustion chamber (1) is provided with a combustion head (2), which includes a first combustion part (21) and a second combustion part (22). The side walls of the first combustion part (21) and the second combustion part (22) are provided with a number of inclined air holes (24) evenly distributed around the center point. The inner wall of the combustion chamber (1) is provided with an air pipe (3), an ignition gun (4), and a fire probe (5), which are located on the outer wall of the first combustion part (21).

2. The low-NOx burner according to claim 1, characterized in that: The burner head (2) is provided with a reduced diameter section (25), and the reduced diameter section (25) extends to a straight cylindrical section (26) at the end with a smaller diameter. The interior of the straight cylindrical section (26) and the reduced diameter section (25) are in communication with the combustion chamber (1).

3. The low-NOx burner according to claim 2, characterized in that: The first combustion section (21) is disposed in the reduced diameter section (25), and the second combustion section (22) and the third combustion section (23) are disposed sequentially in the straight section (26), wherein the third combustion section (23) is away from the first combustion section (21).

4. The low-NOx burner according to claim 3, characterized in that: The fire probe (5) is provided with a detection part (51) and is located between the first combustion part (21) and the second combustion part (22).

5. The low-NOx burner according to claim 3, characterized in that: The ignition gun (4) is equipped with an ignition needle (41) and is located at the outlet of the air tube (3).

6. The low-NOx burner according to claim 4 or 5, characterized in that: It also includes a housing (9.1), a fan (6) is provided on one side of the housing (9.1), an air filter (7) is provided at the other end of the housing (9.1), and a ventilation channel (9.11) is provided in the housing (9.1).

7. The low-NOx burner according to claim 6, characterized in that: The ventilation channel (9.11) is fixedly connected to the combustion chamber (1). The combustion chamber (1) is provided with a first gas interface (8) and a second gas interface (9). The second gas interface (9) is fixedly connected to the gas pipe (3).

Images