High-residual carbon liquid fuel efficient burner and using method thereof

Abstract

The invention provides a high-residual carbon liquid fuel efficient burner. The high-residual carbon liquid fuel efficient burner comprises a first air pipe, a second air pipe and a third air pipe which are coaxially arranged in a sleeved mode from inside to outside. A primary air duct, a secondary air duct and a tertiary air duct are respectively formed between the oil gun and the first air pipe, between the oil gun and the second air pipe and between the oil gun and the third air pipe; the separators are located in the tertiary air duct, extend in the radial direction of the tertiary air duct and divide the tertiary air duct into a plurality of adjustable areas; wherein each separator is provided with a plurality of mounting rails, each adjustable area is internally provided with a plurality of arc-shaped baffles corresponding to the mounting rails, and the two ends of each arc-shaped baffle are detachably fixed through the corresponding mounting rails on the two separators adjacent to the adjustable area. The first ends of all the arc-shaped baffles abut against the inner wall of the third air pipe, the included angles formed by the second ends of all the arc-shaped baffles and the third air pipe are preset angles, and all the preset angles are arranged in a gradient mode; the adaptability of the burner and the flexibility of flame shape regulation and control are improved.

Description

Technical Field

[0001] This invention relates to the field of swirl burner technology, and more particularly to a high-efficiency burner for high residual carbon liquid fuels and its method of use. Background Technology

[0002] Heavy fuel oil is widely used in industry, energy production and transportation due to its high calorific value and high economy. However, due to its chemical composition and physical properties, heavy fuel oil has problems such as low combustion stability and high pollution emissions during combustion.

[0003] Based on the characteristics of the airflow at the burner outlet, burners can be divided into direct-flow burners and swirl burners. Compared with direct-flow burners, swirl burners can produce a stronger mixture of fuel and air, thereby improving combustion stability and reducing pollutant generation. Therefore, most burners on the market for heavy fuel oil are currently swirl burners. The design of swirl burners is usually aimed at generating a stable swirl to improve combustion. Air passing through the swirl blades of the swirl burner generates a strong rotating airflow. Ideally, the rotating airflow will establish a recirculation zone in the center of the flame, improving ignition stability by drawing in high-temperature flue gas from the furnace and absorbing heat generated during combustion. However, if there is poor fuel-air mixing, excessive airflow turbulence, burner wear, or contamination, unstable swirl generation can easily occur, leading to phenomena such as flaking.

[0004] Existing swirl burners have the following technical defects: First, they have low adaptability. In actual operation, when the fuel and / or working conditions differ from the ideal conditions, the actual combustion effect of existing swirl burners is poor, and it is difficult to adopt effective improvement measures. Second, the flexibility of flame shape control is low. Flame control can only be achieved by adjusting the fuel and air ratio. When the flame shape control is poor, heat radiation may be radiated onto the boiler wall or other nearby swirl burners, which may seriously shorten the service life of the boiler or other nearby swirl burners, or cause excessive swirl intensity, which may lead to an increase in temperature during combustion and thus increase the formation of nitrogen oxides, or cause insufficient swirl intensity, resulting in a decrease in combustion effect. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this invention provides a high-efficiency burner for high residual carbon liquid fuels, thereby improving the adaptability of the burner and the flexibility of flame shape control.

[0006] To achieve the above objectives, the present invention provides a high-efficiency burner for high-carbon residual liquid fuels, comprising:

[0007] The first, second, and third air ducts are coaxially nested from the inside out.

[0008] The oil gun is located inside the first air duct, and an annular primary air duct is formed between the oil gun and the first air duct. The annular gap between the first air duct and the second air duct is the secondary air duct, and the annular gap between the second air duct and the third air duct is the tertiary air duct.

[0009] Multiple separators, located in the tertiary air duct and extending radially along the tertiary air duct, divide the tertiary air duct into multiple adjustable zones;

[0010] Each of the partitions is provided with multiple mounting rails, and each of the adjustable areas is provided with multiple arc-shaped baffles corresponding to the multiple mounting rails. The two ends of each arc-shaped baffle are detachably fixed by the corresponding mounting rails on two partitions adjacent to the adjustable area, so that the first end of each arc-shaped baffle abuts against the inner wall of the third air duct, and the angle formed between the second end of each arc-shaped baffle and the third air duct is a preset angle, and the preset angles are set in a gradient.

[0011] In some embodiments, each of the partitions is provided with a first mounting track, and each of the adjustable regions is provided with a first angle arc-shaped baffle. The two ends of the first angle arc-shaped baffle are detachably fixed by the first mounting tracks on two partitions adjacent to the adjustable region, so that the first end of the first angle arc-shaped baffle abuts against the inner wall of the third air duct, and the angle formed between the second end of the first angle arc-shaped baffle and the third air duct is a first preset angle.

[0012] In some embodiments, each of the partitions is further provided with a second mounting rail, and each of the adjustable areas is provided with a second angled arc baffle. The two ends of the second angled arc baffle are detachably fixed by the second mounting rails on two partitions adjacent to the adjustable area, so that the first end of the second angled arc baffle abuts against the inner wall of the third air duct, and the angle between the second end of the second angled arc baffle and the third air duct is a second preset angle.

[0013] In some embodiments, each of the partitions is further provided with a third mounting rail, and each of the adjustable regions is provided with a third angle arc-shaped baffle. The two ends of the third angle arc-shaped baffle are detachably fixed by the third mounting rails on two partitions adjacent to the adjustable region, so that the first end of the third angle arc-shaped baffle abuts against the inner wall of the third air duct, and the angle between the second end of the third angle arc-shaped baffle and the third air duct is a third preset angle.

[0014] In some embodiments, the first preset angle, the second preset angle, and the third preset angle are set in a gradient; the first preset angle, and / or the second preset angle, and / or the third preset angle are taken in a range greater than 0° and less than or equal to 30°.

[0015] In some embodiments, the secondary air duct is further provided with multiple swirl blades, one end of which is connected to the primary air duct, the second end of which is connected to the secondary air duct, and the outlet end of the primary air duct is located inside the secondary air duct.

[0016] In some embodiments, the angle between the swirl blades and the central axis of the burner ranges from 45° to 60°; the number of swirl blades is 12 to 25.

[0017] In some embodiments, the number of separators is 3-6, the separators extending radially along the third air duct and dividing the third air duct into 3-6 adjustable zones.

[0018] The present invention also provides a method for using a high-efficiency burner for high residual carbon liquid fuel, which employs the high-efficiency burner as described above. The high-efficiency burner is arranged in different ways in the furnace, specifically, arranged on two walls, single or multiple tangential circles, staggered, or opposed arrangement.

[0019] In some embodiments, the preset angles of the arc baffles in the upper, lower, left, and right areas of the tertiary air duct can be adjusted by selecting arc baffles with appropriate angles from among the various arc baffles and installing or not installing the arc baffles.

[0020] The high-carbon residual liquid fuel high-efficiency burner provided by the present invention enhances fuel-air mixing by selectively installing a first-angle arc-shaped baffle, increases the outlet airflow velocity of the tertiary air duct, and causes the airflow to contract inward, which helps to lengthen the inner recirculation zone formed by the secondary rotating airflow and increase the velocity of the recirculation airflow, thereby enhancing both the early mixing of fuel in the recirculation zone and the later mixing far from the recirculation zone.

[0021] By installing a first-angle arc-shaped baffle in the adjustable area on one side of the burner, while not installing a first-angle arc-shaped baffle in the adjustable area on the opposite side of the burner, the airflow velocity on the burner outlet side is made higher than that on the opposite side, forming a velocity difference. This allows the air on the side to carry away the liquid droplets more quickly, while increasing the velocity of the return airflow from the side to the opposite side. This can effectively improve the uneven distribution of fuel and air, correct the airflow direction, prevent high-temperature airflow from scouring the bottom of the furnace, and extend the life of the water-cooled wall.

[0022] The high-carbon residual liquid fuel high-efficiency burner provided by this invention has excellent adaptability. For different arrangements in the furnace, such as two-wall arrangement, single or multiple tangential circles, staggered, and opposing arrangements, the installation or non-installation of the first angle arc baffle in multiple adjustable areas in the tertiary air duct can be adaptively selected to change the corresponding air outlet angle of the adjustable area. This improves the adaptability of the burner and the flexibility of flame shape control, ensures stable combustion effect, and avoids serious shortening of the service life of the boiler or other nearby burners caused by poor flame shape control, or combustion effect deviating from ideal conditions or increasing the formation of nitrogen oxides caused by excessive or insufficient swirl intensity.

[0023] The high-carbon residual liquid fuel high-efficiency burner provided by this invention can also reduce the formation of nitrogen oxides. Heavy fuel oil has a high calorific value and the combustion temperature is higher than that of ordinary fuels. By introducing swirl or eddy currents, the burner improves the mixing of fuel and air. It can also adaptably select whether or not the first angle arc-shaped baffle is installed in multiple adjustable areas within the tertiary air duct, thereby changing the corresponding air outlet angle of the adjustable area. This improves the adaptability of the burner and the flexibility of flame shape control, ensuring stable combustion effect and enabling the fuel to burn more completely, thereby reducing the formation of nitrogen oxides. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the high-carbon residual liquid fuel high-efficiency burner structure shown in an embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the high-carbon residual liquid fuel high-efficiency burner structure shown in an embodiment of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the high-carbon residual liquid fuel high-efficiency burner structure shown in an embodiment of the present invention. Figure 3 ;

[0027] Figure 4 This is a temperature distribution diagram at the cross-section of the central axis of a swirl burner with an initial swirl intensity of 1 and no baffle installed, as shown in the embodiment of the present invention.

[0028] Figure 5 This is a temperature distribution diagram at the central axis of a swirl burner with no baffle installed and a swirl intensity of 1.1, as shown in the embodiment of the present invention.

[0029] Figure 6 This is a temperature distribution diagram at the central axis of a swirl burner with no baffle installed and a swirl intensity of 1.2, as shown in the embodiment of the present invention.

[0030] Figure 7This is a temperature distribution diagram on the cross-section of the central axis of a swirl burner with a third-angle arc-shaped baffle (30°) and a swirl intensity of 1, as shown in the initial setup of this embodiment of the invention.

[0031] Figure 8 This is a temperature distribution diagram on the cross-section of the central axis of a swirl burner with a third-angle arc-shaped baffle (30°) and a swirl intensity of 1.5, as shown in the initial setup of this embodiment of the invention.

[0032] Figure 9 This is a temperature distribution diagram on the cross-section of the central axis of a swirl burner with a third-angle arc-shaped baffle (30°) and a swirl intensity of 2, as shown in the initial setup of this embodiment of the invention.

[0033] Figure 10 The graph shows the variation of the predicted maximum combustion temperature with swirl intensity.

[0034] Figure 11 The graph shows the variation of the predicted thermal efficiency with the intensity of the swirl flow.

[0035] Figure 12 This is a velocity distribution diagram at the cross-section of the central axis of a swirl burner with an initial swirl intensity of 1 and no baffle installed, as shown in the embodiment of the present invention.

[0036] Figure 13 This is a velocity distribution diagram at the central axis of a swirl burner with no baffle installed and a swirl intensity of 1.1, as shown in the embodiment of the present invention.

[0037] Figure 14 This is a velocity distribution diagram at the central axis of a swirl burner with an initial swirl intensity of 1.2 and no baffle installed, as shown in the embodiment of the present invention.

[0038] Figure 15 This is a velocity distribution diagram on the cross-section of the central axis of a swirl burner with a third-angle arc-shaped baffle (30°) and a swirl intensity of 1, as shown in the initial setup of this embodiment of the invention.

[0039] Figure 16 This is a velocity distribution diagram on the cross-section of the central axis of a swirl burner with a third-angle arc-shaped baffle (30°) and a swirl intensity of 1.5, as shown in the initial setup of this embodiment of the invention.

[0040] Figure 17 This is a velocity distribution diagram on the cross-section of the central axis of a swirl burner with a third-angle arc-shaped baffle (30°) and a swirl intensity of 2, as shown in the initial setup of this embodiment of the invention.

[0041] In the attached figures, the following labels are used:

[0042] 1-First ductwork;

[0043] 2-Secondary air duct;

[0044] 3-Third-stage air duct;

[0045] 4-Swirl blades;

[0046] 5-Separator;

[0047] 51-First mounting rail;

[0048] 52-Second mounting rail;

[0049] 53-Third installation rail;

[0050] 61 - First angle arc-shaped baffle;

[0051] 62 - Second angle arc-shaped baffle;

[0052] 63 - Third-angle arc-shaped baffle;

[0053] 7-Oil gun. Detailed Implementation

[0054] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the appended claims.

[0055] Certain terms are used in this specification and the following claims to refer to specific components or parts. Those skilled in the art will understand that users or manufacturers may use different names or terms to refer to the same component or part. This specification and the following claims do not distinguish components or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout this specification and the following claims are open-ended and should be interpreted as "including but not limited to". Furthermore, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections made through other means.

[0056] It should be noted that in the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and "about", or "approximately", "substantially", "left and right", etc., indicating the orientation or positional relationship or parameters, are all based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, a specific size, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] An embodiment of the present invention provides a high-efficiency burner for high-carbon residual liquid fuel, comprising: a primary air duct, a secondary air duct 2, and a tertiary air duct 3 coaxially arranged from the inside to the outside; in this embodiment, the outer diameters of the primary air duct 1, the secondary air duct 2, and the tertiary air duct 3 are 80mm, 240mm, and 320mm, respectively; an oil gun 7 disposed inside the primary air duct 1, forming an annular primary air channel between the oil gun 7 and the primary air duct 1, the annular gap between the primary air duct 1 and the secondary air duct 2 forming a secondary air channel, and the annular gap between the secondary air duct 2 and the tertiary air duct 3 forming a tertiary air channel; and multiple separators located in the tertiary air duct... In the duct, extending radially along the third duct 3, the third duct is divided into multiple adjustable areas; each of the partitions is provided with multiple mounting rails, and each adjustable area is provided with multiple arc-shaped baffles corresponding to the multiple mounting rails. The two ends of each arc-shaped baffle are detachably fixed by corresponding mounting rails on two partitions adjacent to the adjustable area, so that the first end of each arc-shaped baffle abuts against the inner wall of the third duct, the angle formed between the second end of each arc-shaped baffle and the third duct 3 is a preset angle, and the preset angles are set in a gradient. The second end of each arc-shaped baffle is on a concentric circle at the outlet end of the third duct 3.

[0058] Each of the partitions is provided with a first mounting rail 51, and each of the adjustable areas is provided with a first angle arc-shaped baffle. The two ends of the first angle arc-shaped baffle are detachably fixed by the first mounting rails 51 on two partitions adjacent to the adjustable area, so that the first end of the first angle arc-shaped baffle abuts against the inner wall of the third air duct 3. The angle formed between the second end of the first angle arc-shaped baffle and the third air duct 3 is a first preset angle. The angle between the second end of the first angle arc-shaped baffle and the third air duct 3 is recorded as the mounting angle of the arc-shaped baffle.

[0059] In some embodiments, each of the partitions is further provided with a second mounting rail 52, and each of the adjustable areas is provided with a second angled arc-shaped baffle 62. The two ends of the second angled arc-shaped baffle 62 are detachably fixed by the second mounting rails 52 on two partitions adjacent to the adjustable area, so that the first end of the second angled arc-shaped baffle 62 abuts against the inner wall of the third air duct 3, and the angle between the second end of the second angled arc-shaped baffle 62 and the third air duct 3 is a second preset angle. The angle between the second end of the second angled arc-shaped baffle 62 and the third air duct 3 is recorded as the mounting angle of the arc-shaped baffle.

[0060] In some embodiments, each of the partitions is further provided with a third mounting rail 53, and each of the adjustable areas is provided with a third angle arc-shaped baffle 63. The two ends of the third angle arc-shaped baffle 63 are detachably fixed by the third mounting rail 53 on two partitions adjacent to the adjustable area, so that the first end of the third angle arc-shaped baffle 63 abuts against the inner wall of the third air duct 3, and the angle between the second end of the third angle arc-shaped baffle 63 and the third air duct 3 is a third preset angle. The angle between the second end of the third angle arc-shaped baffle 63 and the third air duct 3 is recorded as the mounting angle of the arc-shaped baffle.

[0061] The first preset angle, the second preset angle, and the third preset angle are set in a gradient; the first preset angle, and / or the second preset angle, and / or the third preset angle are taken in a range greater than 0° and less than or equal to 30°; the first preset angle is 10°, the second preset angle is 20°, and the third preset angle is 30°.

[0062] In this embodiment, the secondary air duct is also provided with multiple swirl blades 4. One end of the swirl blade 4 is connected to the primary air duct 1, and the second end of the swirl blade 4 is connected to the secondary air duct 2. The outlet end of the primary air duct 1 is located inside the secondary air duct 2.

[0063] The angle between the swirl blade 4 and the central axis of the burner is in the range of 45°-60°; the number of swirl blades 4 is 12-25, preferably 12-18.

[0064] Specifically, for example, in this embodiment, the number of separators 5 can be four. The four separators 5 extend radially along the third air duct 3 and divide the third air duct into four adjustable areas. At this time, the number of the first angle arc baffle 61, the second angle arc baffle 62, and the third angle arc baffle 63 are all four. The second ends of the first angle arc baffle 61, the second angle arc baffle 62, and the third angle arc baffle 63 are located on the concentric circles at the outlet end of the third air duct 3.

[0065] In other embodiments of the present invention, a method for using a high-efficiency burner for high-carbon residual liquid fuel is disclosed. The high-efficiency burner is used as described in the foregoing embodiments. The high-efficiency burner is arranged in different ways in the furnace, such as arranged on two walls, single or multiple tangential circles, staggered, or opposing arrangements. The arc-shaped baffles at appropriate angles can be selected from various arc-shaped baffles for installation or non-installation to adjust the preset angles of the arc-shaped baffles in the upper, lower, left, and right areas of the tertiary air duct, i.e., the installation angles. This allows for flexible control of the flame shape adjustment to ensure stable combustion.

[0066] Specifically, another embodiment of the present invention provides a method for using a high-carbon residual liquid fuel high-efficiency burner, employing four of the aforementioned burners, arranged in a tangential circular pattern at the four corners, comprising the following steps:

[0067] (1) Adjust the installation position of the burner so that the four adjustable areas correspond to the upper, lower, left and right sides of the tertiary air duct respectively;

[0068] (2) By selecting an arc-shaped baffle with a suitable angle from the first angle arc-shaped baffle 61, the second angle arc-shaped baffle 62, and the third angle arc-shaped baffle 63 and installing or not installing the arc-shaped baffle, the installation angle of the arc-shaped baffle at the upper and lower sides of the tertiary air duct is adjusted so that the installation angle of the arc-shaped baffle at the lower side of the tertiary air duct is greater than the installation angle of the arc-shaped baffle at the upper side of the tertiary air duct; wherein, the installation angle of the arc-shaped baffle corresponding to not installing the arc-shaped baffle is recorded as 0°;

[0069] (3) Determine the installation angle of the arc-shaped baffles in the left and right areas of the tertiary air duct based on the angle between the burner and the central axis of the front and rear walls of the furnace; and adjust the installation angle of the arc-shaped baffles in the left and right areas of the tertiary air duct by selecting an arc-shaped baffle with a suitable angle from the first angle arc-shaped baffle 61, the second angle arc-shaped baffle 62 and the third angle arc-shaped baffle 63 and installing or not installing the arc-shaped baffles.

[0070] Furthermore, another embodiment of the present invention provides a method for using a high-carbon residual liquid fuel high-efficiency burner, which, when the burner is arranged against a wall, includes the following steps:

[0071] (1) Adjust the installation position of the burner so that the four adjustable areas correspond to the upper, lower, left and right sides of the tertiary air duct respectively;

[0072] (2) By selecting an arc-shaped baffle with a suitable angle from the first angle arc-shaped baffle 61, the second angle arc-shaped baffle 62, and the third angle arc-shaped baffle 63 and installing or not installing the arc-shaped baffle, the installation angle of the arc-shaped baffle at the upper and lower sides of the tertiary air duct is adjusted so that the installation angle of the arc-shaped baffle at the lower side of the tertiary air duct is greater than the installation angle of the arc-shaped baffle at the upper side of the tertiary air duct; wherein, the installation angle of the arc-shaped baffle corresponding to not installing the arc-shaped baffle is recorded as 0°;

[0073] (3) By selecting an arc baffle with a suitable angle from the first angle arc baffle 61, the second angle arc baffle 62 and the third angle arc baffle 63 and installing or not installing the arc baffle, the installation angle of the arc baffle in the left and right areas of the tertiary air duct is adjusted so that the installation angle of the arc baffle on the left side of the tertiary air duct is equal to the installation angle of the arc baffle on the right side of the tertiary air duct.

[0074] In summary, the high-carbon liquid fuel high-efficiency burner provided by this invention improves the adaptability of the burner and the flexibility of flame shape control. By selecting a baffle with an appropriate installation angle according to the actual operating conditions, the angle of the air outlet in different areas can be adjusted, thereby improving the adaptability of the burner and the flexibility of flame shape control. This avoids serious shortening of the service life of the boiler or other nearby burners caused by poor flame shape control, or deviation of the combustion effect from the ideal operating conditions or increased formation of nitrogen oxides caused by excessive or insufficient swirl intensity.

[0075] In more detail, using Fluent software to... Figure 1-3 Combustion simulation was performed on the high-efficiency burner with high residual carbon liquid fuel shown. The combustion of heavy fuel oil slurry under 100% heavy fuel load in the boiler was studied using numerical simulation.

[0076] Initial settings: Primary cyclone airflow 60%, secondary direct current airflow 40%. Figures 4 to 6 and Figures 12 to 14 The diagrams show the temperature and velocity distributions at the central axis of the burner with swirl intensities of 1, 1.1, and 1.2 when no baffles are installed. As the swirl intensity increases, the fuel-air mixture becomes more uniform, the combustion temperature increases, and the combustion thermal efficiency increases. However, the stiffness of the outer secondary direct current airflow is insufficient; when the swirl intensity increases to 1.2, flash occurs. The adaptability, flame control flexibility, and combustion stability of the burner 1000 are improved by adjusting the baffle settings within the tertiary air duct. Details are as follows:

[0077] against Figure 6 To address the issue of edge protrusion in the swirling airflow at the outlet, a baffle was selected and installed within the tertiary air duct based on actual requirements. The following adjustment scheme was proposed, and numerical simulation results were analyzed.

[0078] Adjustment Plan A: Install third-angle arc-shaped baffles 63 (the installation angle of the arc-shaped baffles is 30°) on the adjustable areas of the upper, lower, left and right sides of the tertiary air duct of each burner.

[0079] Figures 7 to 8 The temperature distribution diagrams at the cross-section of the burner's central axis under different swirl intensities corresponding to adjustment scheme A are shown respectively. Figures 15 to 17The velocity distribution diagrams at the central axis of the burner under different swirl intensities corresponding to adjustment scheme A are shown. (Comparison) Figure 14 and Figure 15 As can be seen, after adjustments according to scheme A, compared to the initial settings, the air at the outlet of the adjustable zone of the tertiary air duct of each burner is accelerated by the first-angle arc-shaped baffle 61, increasing the airflow rigidity. This airflow suppresses the swirling airflow generated in the tertiary air duct, preventing slickness, and also suppressing slickness generated by swirling intensities 1.5 and 2. Furthermore, because the tertiary air velocity increases, the recirculation velocity also increases, shortening the high-temperature flame zone, which is beneficial for increasing the recirculation zone temperature and accelerating combustion. Figure 10 and Figure 11 As shown, when the secondary air swirl intensity is 1, installing a baffle will reduce the maximum combustion temperature and reduce the combustion thermal efficiency. However, after installing a baffle, it is possible to ensure that the secondary air swirl intensity is increased without the occurrence of flash. The increased secondary swirl intensity expands and widens the recirculation zone, increases the maximum combustion temperature, and improves the thermal efficiency.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A high-efficiency burner for high-carbon residual liquid fuel, characterized in that: include: The first, second, and third air ducts are coaxially nested from the inside out. The oil gun is located inside the first air duct, and an annular primary air duct is formed between the oil gun and the first air duct. The annular gap between the first air duct and the second air duct is the secondary air duct, and the annular gap between the second air duct and the third air duct is the tertiary air duct. Multiple separators, located in the tertiary air duct and extending radially along the tertiary air duct, divide the tertiary air duct into multiple adjustable zones; Each of the partitions is provided with multiple mounting rails, and each of the adjustable areas is provided with multiple arc-shaped baffles corresponding to the multiple mounting rails. The two ends of each arc-shaped baffle are detachably fixed by the corresponding mounting rails on two partitions adjacent to the adjustable area, so that the first end of each arc-shaped baffle abuts against the inner wall of the third air duct, and the angle formed between the second end of each arc-shaped baffle and the third air duct is a preset angle, and the preset angles are set in a gradient.

2. The high-carbon residual liquid fuel high-efficiency burner according to claim 1, characterized in that: Each of the partitions is provided with a first mounting track, and each of the adjustable areas is provided with a first angle arc-shaped baffle. The two ends of the first angle arc-shaped baffle are detachably fixed by the first mounting tracks on two partitions adjacent to the adjustable area, so that the first end of the first angle arc-shaped baffle abuts against the inner wall of the third air duct, and the angle formed between the second end of the first angle arc-shaped baffle and the third air duct is a first preset angle.

3. The high-efficiency burner for high-carbon residual liquid fuels according to claim 2, characterized in that: Each of the partitions is further provided with a second mounting rail, and each of the adjustable areas is provided with a second angle arc-shaped baffle. The two ends of the second angle arc-shaped baffle are detachably fixed by the second mounting rails on the two partitions adjacent to the adjustable area, so that the first end of the second angle arc-shaped baffle abuts against the inner wall of the third air duct, and the angle between the second end of the second angle arc-shaped baffle and the third air duct is a second preset angle.

4. The high-efficiency burner for high-carbon residual liquid fuels according to claim 3, characterized in that: Each of the partitions is further provided with a third mounting rail, and each of the adjustable areas is provided with a third angle arc-shaped baffle. The two ends of the third angle arc-shaped baffle are detachably fixed by the third mounting rails on two partitions adjacent to the adjustable area, so that the first end of the third angle arc-shaped baffle abuts against the inner wall of the third air duct, and the angle between the second end of the third angle arc-shaped baffle and the third air duct is a third preset angle.

5. The high-carbon residual liquid fuel high-efficiency burner according to claim 4, characterized in that: The first preset angle, the second preset angle, and the third preset angle are set in a gradient; the first preset angle, and / or the second preset angle, and / or the third preset angle are taken in a range greater than 0° and less than or equal to 30°.

6. The high-carbon residual liquid fuel high-efficiency burner according to claim 1, characterized in that: The secondary air duct is also equipped with multiple swirl blades. One end of the swirl blade is connected to the primary air duct, and the second end of the swirl blade is connected to the secondary air duct. The outlet end of the primary air duct is located inside the secondary air duct.

7. The high-efficiency burner for high-carbon residual liquid fuels according to claim 6, characterized in that: The angle between the swirl blades and the central axis of the burner ranges from 45° to 60°; the number of swirl blades is 12 to 25.

8. The high-efficiency burner for high-carbon residual liquid fuels according to claim 1, characterized in that: The number of the separators is 3-6, and the separators extend radially along the third air duct and divide the third air duct into 3-6 adjustable zones.

9. A method of using a high-carbon residual liquid fuel high-efficiency burner, employing the high-efficiency burner as described in any one of claims 1-9, characterized in that: The high-efficiency burners are arranged in different ways in the furnace, specifically, arranged on two walls, single or multiple tangential circles, staggered, or opposed.

10. The method of using the high-carbon residual liquid fuel high-efficiency burner according to claim 9, characterized in that: The preset angles of the arc baffles on the upper, lower, left, and right sides of the tertiary air duct can be adjusted by selecting arc baffles with appropriate angles from various arc baffles and installing or not installing them.

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