Novel secondary combustion burner
By using heat-resistant components and refueling components in secondary combustion fire outlets, the problems of deformation of fire outlet materials and nitrogen oxide emissions at high temperatures are solved, which extends the equipment life and improves combustion efficiency and reduces nitrogen oxide emissions.
Patent Information
- Application Number
- CN202421021250.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-12
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-12
AI Technical Summary
The existing secondary combustion ports are prone to reduced structural integrity due to thermal stress deformation, softening or chemical corrosion under high temperature conditions, and the nitrogen oxide emission is large, resulting in environmental pollution and shortening of equipment service life.
The heat-resistant components are used to protect the fire port structural materials, and the secondary combustion temperature and oxygen content are reduced through the return combustion module, and nitrogen oxide emissions are reduced.
Extend the service life of the equipment, improve CO combustion efficiency, reduce nitrogen oxide emissions, and protect the fire outlet materials from high temperature corrosion.
Smart Images
Figure CN222186924U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biomass burners, in particular to a novel secondary combustion burner. Background Art
[0002] The secondary combustion burner is a structure used to promote the secondary combustion process. In the working principle of the biomass burner, the primary combustion converts the biomass fuel into heat energy, during which some incompletely burned gases and combustible particles will be produced. Secondary air can be introduced through the secondary combustion burner to promote further combustion of these primary combustion products.
[0003] However, the existing secondary combustion burners still have certain defects when in use. For example, the existing biomass burner burners generally have problems such as excessive oxygen content and excessive nitrogen oxides. If these gases are not treated, it will cause environmental pollution. In addition, due to the extremely high flame temperature in the secondary combustion process, which can reach thousands of degrees Celsius, the burner material may be deformed, softened or even melted due to thermal stress under long-term high temperature, thereby reducing its structural integrity. At the same time, the gas generated by combustion contains chemical substances such as sulfur dioxide and nitrogen oxides. They may react with water vapor under high temperature conditions to generate acidic substances, causing chemical corrosion to the burner material, thereby affecting the service life of the equipment. Utility Model Content
[0004] The utility model aims to solve the shortcomings existing in the background technology and provide a new type of secondary combustion burner. In order to solve the above problems, through the setting of heat-resistant components, the burner structure material can be protected from direct erosion by high-temperature flames and combustion products, thereby extending the service life of the equipment and improving the combustion efficiency of CO. Moreover, through the setting of the backfire component, the secondary combustion temperature and oxygen content can be appropriately reduced, thereby reducing the emission of nitrogen oxides.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of secondary combustion burner, comprising: a burner body, a burner outer tube is provided on one side of the burner body, and a secondary fan is provided on the top of the burner body; a heat-resistant component is provided on the top of the burner body, which is used to protect the burner from erosion; and a flashback component is provided between the burner body and the burner outer tube, which is used to reduce the emission of nitrogen oxides.
[0006] Furthermore, the heat-resistant component includes: an inner tube of the burner port arranged inside the burner body, a high-temperature channel is opened inside the inner tube of the burner port, an annular refractory layer is arranged inside the high-temperature channel, a heat-resistant layer is arranged on one side of the annular refractory layer, a connecting seat is arranged on the outer side of the inner tube of the burner port, and the outer tube of the burner port and the connecting seat are movably connected to the burner body by bolts; a conical guide pipe is arranged inside the outer tube of the burner port.
[0007] Furthermore, a plurality of cyclone guide vanes are provided between the burner inner tube and the connecting seat, and the burner inner tube and the connecting seat are fixedly connected via the plurality of cyclone guide vanes.
[0008] Furthermore, a diesel ignition device is provided on one side of the burner body, an ash outlet is provided on one side of the burner body, and a secondary combustion zone is opened inside the outer tube of the burner. Through the setting of the diesel ignition device, the biomass wood chips inside the burner body can be ignited.
[0009] Furthermore, the backburning component includes: an air duct arranged on one side of the secondary fan, one end of the air duct extending into the interior of the burner body; an air inlet pipe arranged on one side of the secondary fan, one end of the air inlet pipe being connected to a flue gas backburning pipe via a three-way pipe, and a secondary air channel is opened on one side of the inner wall of the burner body. Through the arrangement of the secondary fan and the flue gas backburning pipe, incompletely burned flue gas can be guided back into the interior of the burner body.
[0010] Furthermore, an air volume regulating door is provided inside the air duct, and one end of the air inlet duct is connected to a secondary air inlet duct via a three-way pipe.
[0011] Furthermore, a supporting plate is provided inside the burner body, and a feed port is provided on the top of the burner body.
[0012] The utility model provides a new type of secondary combustion burner, which has the following beneficial effects:
[0013] The utility model has the advantages that, by setting up the heat-resistant component, the burner structure material can be protected from direct erosion by high-temperature flames and combustion products, thereby extending the service life of the equipment. At the same time, the high-temperature channel formed in the burner inner tube can allow the CO entering the secondary combustion zone through the high-temperature channel to have sufficient combustion time, thereby improving the combustion efficiency.
[0014] Secondly, by setting up the secondary fan, air volume regulating door and flue gas backfire pipe in the backfire assembly, the secondary combustion temperature and oxygen content can be appropriately reduced, low-nitrogen combustion can be achieved, and the emission of nitrogen oxides can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0016] Figure 2 It is a sectional view of the overall structure of the utility model.
[0017] Figure 3 It is a side cross-sectional view of the burner outer tube structure of the utility model.
[0018] Figure 4 It is a schematic diagram of the structure of the outer tube of the burner of the utility model.
[0019] Figure 5 It is a cross-sectional schematic diagram of the outer tube structure of the burner of the present utility model.
[0020] Figure 6 For the utility model Figure 2 Enlarged view of point A in .
[0021] Figure 1-6 In: 1. Burner body; 101. Diesel ignition device; 102. Ash outlet; 103. Support plate; 104. Feed port; 105. Secondary air channel; 2. Burner inner tube; 201. High-temperature channel; 202. Annular refractory layer; 203. Heat-resistant layer; 3. Connecting seat; 301. Cyclone guide vane; 4. Conical guide tube; 5. Burner outer tube; 501. Secondary combustion zone; 6. Secondary fan; 601. Air duct; 602. Air volume adjustment door; 7. Air inlet pipe; 701. Secondary air inlet pipe; 702. Flue gas backfire pipe. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0023] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.
[0024] The embodiment of the present application provides a new type of secondary combustion burner, which can protect the burner structure material from direct erosion by high-temperature flames and combustion products through the setting of heat-resistant components, extend the service life of the equipment, and improve the combustion efficiency of CO. Through the setting of the backburning component, the secondary combustion temperature and oxygen content can be appropriately reduced, and the emission of nitrogen oxides can be reduced. The new type of secondary combustion burner is described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.
[0025] The present application is described in detail below with reference to the accompanying drawings and specific implementation methods.
[0026] Example 1
[0027] See also Figure 1-6 In this embodiment, a new type of secondary combustion burner is provided, including: a burner body 1, a burner outer tube 5 is provided on one side of the burner body 1, and a secondary fan 6 is provided on the top of the burner body 1; a heat-resistant component is provided on the top of the burner body 1, which is used to protect the burner from erosion; and a flashback component is provided between the burner body 1 and the burner outer tube 5, which is used to reduce the emission of nitrogen oxides.
[0028] Among them, by setting up the heat-resistant component, the burner structure material can be protected from direct erosion by high-temperature flames and combustion products, thereby extending the service life of the equipment. At the same time, the high-temperature channel 201 formed by the burner inner tube 2 can allow the CO entering the secondary combustion zone 501 through the high-temperature channel 201 to have sufficient combustion time, thereby improving the combustion efficiency;
[0029] Secondly, by setting the secondary fan 6, air volume regulating door 602 and flue gas backfire pipe 702 in the backfire component, the secondary combustion temperature and oxygen content can be appropriately reduced, low-nitrogen combustion can be achieved, and the emission of nitrogen oxides can be reduced.
[0030] Example 2
[0031] On the basis of Example 1, the heat-resistant component includes: a burner inner tube 2 arranged inside the burner body 1, a high-temperature channel 201 is opened inside the burner inner tube 2, an annular refractory layer 202 is arranged inside the high-temperature channel 201, a heat-resistant layer 203 is arranged on one side of the annular refractory layer 202, a connecting seat 3 is provided on the outer side of the burner inner tube 2, and the burner outer tube 5 and the connecting seat 3 are movably connected to the burner body 1 by bolts; a conical guide tube 4 is arranged inside the burner outer tube 5; a plurality of cyclone guide vanes 301 are provided between the burner inner tube 2 and the connecting seat 3, and the burner inner tube 2 and the connecting seat 3 are fixedly connected by the plurality of cyclone guide vanes 301; a diesel ignition device 101 is provided on one side of the burner body 1, an ash outlet 102 is provided on one side of the burner body 1, and a secondary combustion zone 501 is opened inside the burner outer tube 5.
[0032] Among them, through the arrangement of the annular refractory layer 202 and the heat-resistant layer 203, a high-temperature channel 201 can be formed inside the inner tube 2 of the burner, so that the CO entering the secondary combustion zone 501 through the high-temperature channel 201 and the conical guide tube 4 has sufficient time to burn, thereby improving the combustion efficiency. At the same time, the annular refractory layer 202 and the heat-resistant layer 203 can also protect the burner structure material from direct erosion by high-temperature flames and combustion products.
[0033] Example 3
[0034] On the basis of Example 1, the backfire component includes: an air duct 601 arranged on one side of the secondary fan 6, one end of the air duct 601 extends into the interior of the burner body 1; an air inlet duct 7 arranged on one side of the secondary fan 6, one end of the air inlet duct 7 is connected to the flue gas backfire duct 702 through a three-way pipe, and a secondary air channel 105 is opened on one side of the inner wall of the burner body 1; an air volume adjustment door 602 is provided inside the air duct 601, and one end of the air inlet duct 7 is connected to the secondary air inlet duct 701 through a three-way pipe; a support plate 103 is provided inside the burner body 1, and a feed port 104 is provided on the top of the burner body 1.
[0035] When in use, the user can put biomass wood chips through the feed port 104, so that the biomass wood chips fall to the top of the support plate 103, and then ignite the biomass wood chips on the top of the support plate 103 through the diesel ignition device 101, and start the primary fan set on the burner body 1 to burn the biomass wood chips.
[0036] Furthermore, when the biomass inside the burner body 1 is burning, the secondary fan 6 is started at the same time. At this time, the incompletely burned gas will enter the air inlet pipe 7 through the smoke backfire pipe 702, and be guided back to the inside of the burner body 1 through the air duct 601 and the secondary air channel 105. In this process, the secondary fan 6 will also introduce external air through the secondary air inlet pipe 701, thereby introducing secondary air into the burner body 1. There is a certain 100mm gap between the burner inner tube 2 and the secondary air channel 105. When the secondary fan 6 introduces the secondary air, the secondary air will drive the incompletely burned gas to flow along the outside of the burner inner tube 2 to the cyclone guide plate 301, and pass through the gaps between multiple cyclone guide plates 301 to enter the inside of the conical guide pipe 4. At this time, under the guidance of the cyclone guide plate 301, the secondary air will produce high-speed rotation, and at the same time, it will also suck the flame and gas inside the burner body 1 into the burner inner tube 2, and introduce it into the secondary combustion zone 501 through the conical guide pipe 4, thereby performing secondary combustion on the incompletely burned gas.
[0037] The high-temperature burning flame will lead to an increase in NOX. Therefore, the setting of the air inlet pipe 7 and the flue gas backfire pipe 702 can guide NOX back to the inside of the burner body 1, and adjust the mixing ratio of the flue gas through the air volume adjustment door 602, so as to reduce the average oxygen content of the air. When the oxygen content is reduced to 9%, the flame temperature is reduced and the corresponding NOX will also be reduced.
[0038] In addition, a control panel is provided on one side of the burner body 1, and the control panel can control the start and stop of the air volume regulating door 602 and the secondary fan 6, and the power of the device is provided by an external power supply.
[0039] The control program involved in the present utility model can be implemented by those skilled in the art according to the same or similar principles in the prior art, and this part is not the innovation of the present utility model.
[0040] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0041] The above is a detailed introduction to a new type of secondary combustion burner provided in the embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A new type of secondary combustion burner, characterized in that: include: A burner body (1), wherein a burner outer tube (5) is provided on one side of the burner body (1), and a secondary fan (6) is provided on the top of the burner body (1); A heat-resistant component disposed on the top of the burner body (1) for protecting the burner from erosion; and A flashback assembly provided between the burner body (1) and the burner outer tube (5) is used to reduce the emission of nitrogen oxides.
2. The novel secondary combustion burner according to claim 1 is characterized in that: The heat-resistant component comprises: A burner inner tube (2) is arranged inside the burner body (1), a high-temperature channel (201) is provided inside the burner inner tube (2), an annular refractory layer (202) is provided inside the high-temperature channel (201), a heat-resistant layer (203) is provided on one side of the annular refractory layer (202), a connecting seat (3) is provided on the outer side of the burner inner tube (2), and the burner outer tube (5) and the connecting seat (3) are movably connected to the burner body (1) via bolts; A conical flow guide pipe (4) is arranged inside the burner outer pipe (5).
3. The novel secondary combustion burner according to claim 2 is characterized in that: A plurality of cyclone guide plates (301) are provided between the burner inner tube (2) and the connecting seat (3), and the burner inner tube (2) and the connecting seat (3) are fixedly connected via the plurality of cyclone guide plates (301).
4. The novel secondary combustion burner according to claim 1 is characterized in that: A diesel ignition device (101) is provided on one side of the burner body (1), an ash outlet (102) is provided on one side of the burner body (1), and a secondary combustion zone (501) is provided inside the burner outer tube (5).
5. The novel secondary combustion burner according to claim 1 is characterized in that: The flashback assembly comprises: An air duct (601) disposed on one side of the secondary air fan (6), one end of the air duct (601) extending into the interior of the burner body (1); An air inlet pipe (7) is arranged on one side of the secondary air fan (6), one end of the air inlet pipe (7) is connected to a smoke re-ignition pipe (702) via a three-way pipe, and a secondary air channel (105) is provided on one side of the inner wall of the burner body (1).
6. The novel secondary combustion burner according to claim 5, characterized in that: An air volume regulating door (602) is provided inside the air duct (601), and one end of the air inlet duct (7) is connected to a secondary air inlet duct (701) via a three-way pipe.
7. The novel secondary combustion burner according to claim 1, characterized in that: A supporting plate (103) is provided inside the burner body (1), and a feed inlet (104) is provided at the top of the burner body (1).