Natural gas low-nitrogen heat accumulating type burner
By designing a natural gas low-nitrogen regenerative burner, utilizing multiple flue gas channels and a regenerative chamber structure, and adjusting the combustion method, the problem of nitrogen oxide generation caused by local high temperature in the burner was solved, achieving low nitrogen oxide emissions and efficient combustion.
Patent Information
- Application Number
- CN202422836894.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The existing burner has a local high temperature at the output end, which leads to high nitrogen oxide generation efficiency, which is not conducive to emission standards.
A natural gas low-nitrogen regenerative burner is designed, which adopts a regenerative chamber and multiple flue gas channels in the shell. By adjusting the mixing mode of air and gas, low-oxygen atmosphere combustion is achieved. The regenerative air is used for mixed combustion in two steps to control the flame boundary and reduce local high temperature.
It achieves low nitrogen oxide emissions, improves combustion efficiency and heating quality, forms a uniform temperature field, and reduces the generation of nitrogen oxides.
Smart Images
Figure CN223375802U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of burners, and in particular relates to a natural gas low-nitrogen regenerative burner. Background Art
[0002] Burners are essential combustion devices in industrial fuel furnaces. Also known as burners, they are a common name for combustion devices used in industrial fuel furnaces. They can be understood as shorthand for "fire nozzle," and generally refer to the main body of the burner, including the fuel inlet, air inlet, and discharge port. The burner's primary function is to distribute fuel and combustion air and spray them in a specific pattern for combustion.
[0003] During use, it was found that the current burner has the problem of local high temperature at the output end, which increases the efficiency of nitrogen oxide generation and is not conducive to subsequent qualified emissions. Utility Model Content
[0004] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a natural gas low-nitrogen regenerative burner.
[0005] In order to achieve the above technical objectives, the technical solutions adopted by this utility model are as follows:
[0006] A natural gas low-nitrogen regenerative burner comprises a shell, a regenerative chamber is provided in the shell, a natural gas channel is provided on the central axis of the regenerative chamber, a combustion chamber connected to the natural gas channel is provided at the end of the shell, a group of first flue gas channels and a group of second flue gas channels are uniformly distributed in an annular manner at the end of the shell, the second flue gas channels are located outside the first flue gas channels, the first flue gas channel input end and the second flue gas channel input end are both connected to the regenerative chamber output end, the first flue gas channel output end is connected to the combustion chamber, the second flue gas channel output end passes through the shell, and the second flue gas channel output ends are gathered on the outer central axis of the combustion chamber.
[0007] It is further defined that the end of the heat storage chamber is connected to a deceleration chamber, the input end of the first flue gas channel is connected to the inner circle of the deceleration chamber, and the input end of the second flue gas channel is connected to the outer circle of the deceleration chamber. Such a design reduces the airflow velocity, facilitates the full mixing and combustion of fuel and air, and the airflow after deceleration can be better mixed with the fuel, thereby improving combustion efficiency and engine performance.
[0008] It is further defined that the angle between the central axis of the first flue gas channel and the central axis of the natural gas channel is 37°. Such a design can limit the position between the input end and the output end of the first flue gas channel during production, and further limit the spatial position of the deceleration chamber and the combustion chamber adapted at both ends.
[0009] It is further defined that there are four first smoke channels and eight second smoke channels. Such a design ensures the flow rate of the smoke.
[0010] The beneficial effects of adopting the utility model are:
[0011] The structural design of the utility model uses natural gas as fuel. Without changing the ratio of air to gas, low-oxygen atmosphere combustion is achieved by adjusting the mixed combustion of air and gas at different positions. The mixed combustion is carried out twice with the heat-storage air. Compared with the traditional combustion method, local high temperature can be prevented and the generation of nitrogen oxides can be reduced.
[0012] With the structural design of the present invention, the heat storage air ejected from the output end of the second flue gas channel has a faster flow rate than the incomplete combustion gas ejected from the output end of the combustion chamber, so the furnace gas around the output end of the combustion chamber will form a strong suction effect, thereby strengthening the medium mixing, controlling the flame boundary, making the flame more formed, forming a uniform temperature field in the furnace, improving the heating quality and reducing the emission of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention can be further described by way of non-limiting examples given in the accompanying drawings;
[0014] Figure 1 This is a structural diagram of an embodiment of a natural gas low-nitrogen regenerative burner of the utility model;
[0015] Figure 2 for Figure 1 Schematic diagram of the cross-section structure at AA in the middle;
[0016] Figure 3 for Figure 2 Schematic diagram of the cross-section structure at CC;
[0017] Figure 4 for Figure 3 Schematic diagram of the cross-section structure at the middle BB;
[0018] Figure 5 for Figure 3 Schematic diagram of the cross-section structure at DD in the middle;
[0019] The main component symbols are described as follows:
[0020] Shell 1; heat storage chamber 2; natural gas channel 3; combustion chamber 4; first flue gas channel 5; second flue gas channel 6; deceleration chamber 7. DETAILED DESCRIPTION
[0021] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.
[0022] Example 1:
[0023] like Figures 1 to 5 As shown, a natural gas low-nitrogen regenerative burner of the present invention comprises a shell 1, in which a regenerative chamber 2 is arranged, a natural gas channel 3 is provided on the central axis of the regenerative chamber 2 in the shell 1, a combustion chamber 4 connected to the natural gas channel 3 is provided at the end of the shell 1, and a group of first flue gas channels 5 and a group of second flue gas channels 6 are uniformly distributed in an annular manner at the end of the shell 1, the second flue gas channels 6 are located outside the first flue gas channels 5, the input end of the first flue gas channel 5 and the input end of the second flue gas channel 6 are both connected to the output end of the regenerative chamber 2, the output end of the first flue gas channel 5 is connected to the combustion chamber 4, the output end of the second flue gas channel 6 passes through the shell 1, and the output ends of the second flue gas channel 6 are gathered on the outer central axis of the combustion chamber 4.
[0024] In this embodiment, when a natural gas low-nitrogen regenerative burner is used, the regenerative chamber 2 inputs the high-temperature gas inside into the combustion chamber 4 through the first flue gas channel 5, and mixes it with the fuel gas sent into the combustion chamber 4 through the natural gas channel 3, to achieve a mixed combustion in the combustion chamber 4. This mixed combustion forms an oxygen-deficient combustion atmosphere, which can effectively prevent high-temperature combustion and effectively control the generation of nitrogen oxides. The high-temperature gas passing through the second flue gas channel 6 is directly output at the output end of the combustion chamber 4, and mixed with the incomplete combustion gas after the mixed combustion at the output end of the combustion chamber 4 to achieve the purpose of full combustion. Because the flow rate of the gas output from the second flue gas channel 6 is faster than the flow rate of the gas output after passing through the obstruction of the combustion chamber 4, the furnace gas around the output end of the combustion chamber 4 will form a strong entrainment phenomenon, which strengthens the medium mixing, controls the flame boundary, makes the flame more formed, forms a uniform temperature field in the furnace, improves the heating quality and reduces the emission of nitrogen oxides.
[0025] Example 2:
[0026] like Figure 2 As shown, in this embodiment, the end of the regenerator 2 is connected to a deceleration chamber 7, the input end of the first flue gas channel 5 is connected to the inner circle of the deceleration chamber 7, and the input end of the second flue gas channel 6 is connected to the outer circle of the deceleration chamber 7. This design reduces the airflow velocity, which facilitates the full mixing and combustion of the fuel and air. The decelerated airflow can be better mixed with the fuel, thereby improving combustion efficiency and engine performance. The specifications and shape of the deceleration chamber 7 are coordinated with the specifications and dimensions of the regenerator 2, and the output end only needs to ensure communication with the first flue gas channel 5 and the second flue gas channel 6.
[0027] Example 3:
[0028] like Figure 5As shown, in this embodiment, the angle between the central axis of the first flue gas channel 5 and the central axis of the natural gas channel 3 is 37°. Such a design can limit the position between the input end and the output end of the first flue gas channel 5 during production, and further limit the spatial position of the speed reduction chamber 7 and the combustion chamber 4 adapted at both ends. Among them, the degree of the angle between the central axis of the first flue gas channel 5 and the central axis of the natural gas channel 3 is not limited, so as to facilitate the adjustment of the overall specifications according to the actual installation space. The smaller the angle, the shorter the burner or directly the larger it is.
[0029] Example 4:
[0030] like Figure 3 As shown, in this embodiment, there are four first smoke channels 5 and eight second smoke channels 6. Such a design ensures the flow rate of the smoke. The number of the first smoke channels 5 is uncertain, while the number of the second smoke channels 6 is twice the number of the first smoke channels 5, thereby ensuring that the smoke flow rate of the second smoke channels 6 is faster than that of the first smoke channels 5.
[0031] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by persons skilled in the art without departing from the spirit and technical principles disclosed herein shall be covered by the claims of the present invention.
Claims
1. A natural gas low nitrogen regenerative burner, comprising a housing (1), characterized in that: A heat storage chamber (2) is provided in the shell (1), and a natural gas channel (3) is provided on the central axis of the heat storage chamber (2) in the shell (1). A combustion chamber (4) communicating with the natural gas channel (3) is provided at the end of the shell (1). A group of first flue gas channels (5) and a group of second flue gas channels (6) are uniformly distributed in an annular manner at the end of the shell (1). The second flue gas channels (6) are located outside the first flue gas channels (5). The input end of the first flue gas channel (5) and the input end of the second flue gas channel (6) are both communicated with the output end of the heat storage chamber (2). The output end of the first flue gas channel (5) is communicated with the combustion chamber (4). The output end of the second flue gas channel (6) passes through the shell (1), and the output ends of the second flue gas channels (6) are gathered on the central axis outside the combustion chamber (4).
2. The natural gas low nitrogen regenerative burner according to claim 1, characterized in that: The end of the heat storage chamber (2) is connected to a deceleration chamber (7), the input end of the first flue gas channel (5) is connected to the inner circle of the deceleration chamber (7), and the input end of the second flue gas channel (6) is connected to the outer circle of the deceleration chamber (7).
3. The natural gas low nitrogen regenerative burner according to claim 2, characterized in that: The angle between the central axis of the first flue gas channel (5) and the central axis of the natural gas channel (3) is 37°.
4. A natural gas low nitrogen regenerative burner according to claim 3, characterized in that: There are four first flue gas channels (5) and eight second flue gas channels (6).