Linear pipeline burner

Abstract

The utility model relates to a linear pipeline burner which comprises a gas branch pipe, the gas branch pipe extends into a linear pipeline, a plurality of burning modules are linearly arranged at an outlet of the gas branch pipe, each burning module comprises a fuel gas nozzle and a flame stabilizing plate, the fuel gas nozzles are communicated with the gas branch pipe, and the flame stabilizing plates are arranged on the gas branch pipe. Flame stabilizing plates are symmetrically arranged on the front side and the rear side of the fuel gas nozzle, a premixing chamber is formed between the flame stabilizing plates on the two sides, and vent holes are formed in the flame stabilizing plates. The flame stabilizing plates are arranged on the two sides of the fuel gas nozzle, the premixing chamber is formed by the flame stabilizing plates on the two sides, air and fuel gas are evenly mixed in the premixing chamber, heat distribution is optimized, and stable and efficient combustion is achieved in high-speed airflow.

Description

Technical Field

[0001] This utility model relates to the field of industrial heating technology, specifically to a linear pipe burner used to improve the efficiency, stability and accuracy of gas heating in high-speed airflow. Background Technology

[0002] In power generation and industrial waste gas treatment, pipeline burners are typically used to ignite fuel and residual oxygen in the waste gas to further heat the waste gas.

[0003] Existing pipe burners often face the following problems:

[0004] 1. Incomplete combustion leads to energy waste and increased pollutant emissions;

[0005] 2. Uneven heat distribution affects the stability of the production process;

[0006] 3. Low operating efficiency in variable airflow scenarios (especially high-speed and high-pressure scenarios).

[0007] Therefore, there is an urgent need to design a linear pipe burner to optimize heat distribution, ensure uniform mixing of air and fuel gas, and achieve stable and efficient combustion in high-speed airflow. Utility Model Content

[0008] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a linear pipeline burner. Flame stabilizing plates are set on both sides of the fuel gas nozzle, and a premixing chamber is formed by the two flame stabilizing plates. Air and fuel gas are mixed evenly in the premixing chamber, resulting in more complete combustion, optimized heat distribution, and stable and efficient combustion in high-speed airflow.

[0009] The purpose of this utility model is achieved as follows:

[0010] A linear pipeline burner includes a gas branch pipe extending into a linear pipeline. Multiple combustion modules are linearly arranged at the outlet of the gas branch pipe. Each combustion module includes a fuel gas nozzle and a flame stabilizer plate. The fuel gas nozzle is connected to the gas branch pipe. Flame stabilizers are symmetrically arranged on both sides of the fuel gas nozzle, and a premixing chamber is formed between the two flame stabilizers. The flame stabilizer plate is provided with a vent hole.

[0011] Preferably, the fuel gas nozzle is provided with multiple nozzle holes, and the fuel gas nozzle is provided with a direct flow hole at the center and horizontal flow holes around the direct flow hole.

[0012] Preferably, each combustion module is also equipped with a steam nozzle that extends into the premixing chamber of each combustion module. The steam nozzle is connected to a steam branch pipe, through which steam enters the corresponding premixing chamber.

[0013] Preferably, the high-energy ignition gun is inserted into the premixing chamber of the first combustion module, the field of view of the flame monitor is aligned with the first combustion module, the high-energy ignition gun is adapted to the flame monitor, and the flame monitor is electrically connected to the burner control system.

[0014] Preferably, the burner control system is also electrically connected to a temperature sensor, which is used to monitor the outer surface temperature of the gas branch pipe.

[0015] Preferably, the gas branch pipe, steam branch pipe, high-energy igniter and flame monitor extend into the linear pipeline through the pipe flange cover of the linear pipeline. The pipe flange cover is provided with limiting holes corresponding to the gas branch pipe, steam branch pipe, high-energy igniter and flame monitor respectively. The pipe flange cover is connected to the pipe flange of the furnace wall by bolts.

[0016] Preferably, a fixed support assembly is also provided inside the linear pipeline. The fixed support assembly includes a bracket, a support base, and a fixing clamp. The bracket is arranged parallel to the gas branch pipe. The bracket is connected to multiple support bases. The support bases are used to support the high-pressure spray gun at the outlet of the gas branch pipe and multiple combustion modules thereon. The fixing clamp fixes the bracket, the gas branch pipe, the high-pressure ignition gun, and the flame monitor.

[0017] Preferably, each combustion module is equipped with 2-3 fuel gas nozzles.

[0018] Preferably, the DC hole is vertically arranged, and the horizontal flow hole forms an acute angle of 10-30° with the horizontal plane.

[0019] Preferably, the flow rate of the advection orifice accounts for 10%-30%, and the flow rate of the direct current orifice accounts for 70-90%.

[0020] The beneficial effects of this utility model are:

[0021] After the fuel gas and air are fully mixed in the premixing chamber, they enter the combustion zone downstream of the premixing chamber. The premixing chamber is used to fully mix the fuel gas and air before combustion to reduce hot spots and local unburned phenomena.

[0022] The linearly distributed fuel gas nozzles employ two different angle and flow rate designs to achieve stratified combustion, optimize heat distribution, flame morphology, and NOx emissions, and maintain stable combustion performance in high-speed and high-pressure airflows.

[0023] The gas outlet features a linear arrangement of multiple combustion modules consisting of fuel gas nozzles and flame stabilizers. The modular design allows for flexible expansion and can accommodate linear pipelines with diameters ranging from 200mm to 8000mm, facilitating length adjustment according to actual needs. It also enables rapid installation, adjustment, and maintenance, reducing operating costs.

[0024] The flame stabilizer plate conforms to aerodynamic design, corrects airflow direction and prevents eddy formation, thereby improving flame stability and preventing flameout or blowout. In addition, the flame stabilizer plate is made of high-temperature resistant alloy steel to ensure that it does not deform during long-term operation. The surface of the flame stabilizer plate is coated with a corrosion-resistant coating, making it suitable for environments containing corrosive gases.

[0025] Equipped with a high-energy ignition gun, flame monitor, and temperature sensor, the flame monitor and temperature sensor are controlled by the burner control system, enabling safe and reliable ignition and real-time adjustment of the combustion state, thereby improving the burner's heating efficiency, stability, and accuracy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a linear pipe burner according to the present invention.

[0027] Figure 2 for Figure 1 AA sectional view.

[0028] Figure 3 This is a schematic diagram of the fuel gas nozzle.

[0029] Figure 4 for Figure 1 A top view showing the linear arrangement of the combustion modules.

[0030] The components include: 1. Gas branch pipe; 1.1. High-pressure spray gun; 2. Fuel gas nozzle; 2.1. Direct flow hole; 2.2. Horizontal flow hole; 3. Flame stabilizer plate; 4. Premixing chamber; 5. Steam nozzle; 6. Steam branch pipe; 7. High-energy ignition gun; 8. Flame monitor; 9. Furnace wall; 10. Temperature sensor; 11. Pipe flange cover; 12. Bracket; 13. Support seat; 14. Fixing clamp; 15. Expansion joint. Detailed Implementation

[0031] See Figure 1-4 This utility model relates to a linear pipeline burner, including a gas branch pipe 1, a combustion module, a steam nozzle 5, a steam branch pipe 6, a high-energy ignition gun 7, and a flame monitor 8. The gas branch pipe 1 extends into the linear pipeline, and multiple combustion modules are linearly arranged at the outlet of the gas branch pipe 1. Each combustion module includes a fuel gas nozzle 2 and a flame stabilizer plate 3. The fuel gas nozzle 2 is set on the high-pressure spray gun 1.1 of the gas branch pipe and is connected to the gas branch pipe 1. Flame stabilizers 3 are symmetrically arranged on the front and rear sides of the fuel gas nozzle 2, and a premixing chamber 4 is formed between the two flame stabilizers 3. The flame stabilizer plate 3 is provided with a vent hole, and the bottom end of the flame stabilizer plate 3 is fixed to the gas branch pipe. Gas enters the premixing chamber 4 through the fuel gas nozzle 2, and air enters the premixing chamber 4 through the vent hole. After the gas and air are fully mixed in the premixing chamber 4, they enter the combustion area downstream of the premixing chamber. The premixing chamber is used to fully mix the gas and air before combustion to reduce hot spots and local unburned phenomena.

[0032] The fuel gas nozzle 2 is provided with multiple nozzles, which are divided into direct flow nozzles 2.1 and horizontal flow nozzles 2.2. The direct flow nozzle 2.1 is located at the center of the fuel gas nozzle 2, and horizontal flow nozzles 2.2 are arranged around it. The direct flow nozzle 2.1 is vertically positioned, and the horizontal flow nozzles 2.2 form an acute angle of 10-30° with the horizontal plane. The flow rate of the horizontal flow nozzles 2.2 accounts for 10%-30%, providing sufficient heat to the flame root to stabilize the flame. The flow rate of the direct flow nozzles 2.1 accounts for 70-90%, providing the majority of the heat to the burner. The different angles and flow rates of the two types of nozzles achieve stratified combustion, optimizing heat distribution, flame morphology, and NOx emissions.

[0033] The flame stabilizers 3 of adjacent combustion modules are connected by bolts. The modular design allows for flexible expansion and can accommodate linear pipes with diameters ranging from 200mm to 8000mm, facilitating length adjustment according to actual needs. Each combustion module is equipped with two fuel gas nozzles 2 to ensure consistent gas output across all combustion modules.

[0034] The gas can be one or more of natural gas, propane, methane, and hydrogen, and is compatible with a variety of fuels.

[0035] The flame stabilizer plate 3 conforms to aerodynamic design, corrects the airflow direction and prevents vortex formation, thereby improving the stability of the flame and preventing flameout or blowout.

[0036] The flame stabilizer plate 3 is made of high-temperature resistant alloy steel to ensure that it does not deform during long-term operation. The surface of the flame stabilizer plate 3 is coated with a corrosion-resistant coating, making it suitable for environments containing corrosive gases.

[0037] Each combustion module is also equipped with a steam nozzle 5, which extends into the premixing chamber 4 of each combustion module. The steam nozzle 5 is connected to a steam branch pipe 6, and steam enters the corresponding premixing chamber 4 through the steam branch pipe 6. The steam is used to suppress NOx emissions and local high temperatures.

[0038] The high-energy ignition gun 7 extends into the premixing chamber 4 of the first combustion module. The flame monitor 8 is positioned with its field of view aligned with the first combustion module, which is located near the furnace wall 9. The high-energy ignition gun 7 is compatible with the flame monitor 8. The outlet of the high-energy ignition gun 7 is close to the first fuel gas nozzle 2. The high-energy ignition gun 7 has a built-in high-energy igniter that generates an electric spark, initially igniting a small flame. After detecting the small flame, the flame monitor 8 sends feedback to the burner control system (BMS). The BMS then issues a signal to allow main ignition, igniting the main flame and improving the ignition success rate.

[0039] The burner control system is also electrically connected to a temperature sensor 10, which is used to monitor the outer surface temperature of the gas branch pipe. The temperature sensor 10 can be distributed upstream, downstream and key intersections of the combustion module. The temperature sensor 10 provides multi-point monitoring data for the burner control system to adjust in real time. When the temperature sensor detects overheating or drastic temperature fluctuations, the burner control system automatically alarms and adjusts the combustion state.

[0040] The gas branch pipe 1, steam branch pipe 6, high-energy ignition gun 7 and flame monitor 8 extend into the linear pipeline through the pipe flange cover 11 of the linear pipeline. The pipe flange cover 11 is provided with limiting holes corresponding to the gas branch pipe 1, steam branch pipe 6, high-energy ignition gun 7 and flame monitor 8 respectively. The pipe flange cover 11 is connected to the pipe flange of the furnace wall 9 by bolts.

[0041] A fixed support assembly is also provided inside the linear pipeline. The fixed support assembly includes a bracket 12, a support seat 13, and a fixing clamp 14. The bracket 12 is arranged parallel to the gas branch pipe 1. The bracket 12 is connected to multiple support seats 13. The support seats 13 are used to support the high-pressure spray gun 1.1 at the outlet of the gas branch pipe 1 and multiple combustion modules thereon. The fixing clamp 14 fixes the bracket 12, the gas branch pipe 1, the high-pressure ignition gun 7, and the flame monitor 8.

[0042] The gas branch pipe 1 is provided with an expansion joint 15, and the expansion joint 15 is provided with a jacket. Cooling air is introduced into the jacket through the cold air pipe to help cool it.

[0043] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A linear duct burner, characterized by: The burner comprises a gas branch pipe extending into a linear pipe, and a plurality of combustion modules linearly arranged at the outlet of the gas branch pipe, each combustion module comprising a fuel gas nozzle and a flame stabilizer plate, the fuel gas nozzle being in communication with the gas branch pipe, the flame stabilizer plate being symmetrically arranged on both sides of the fuel gas nozzle, and a premixing chamber being formed between the two flame stabilizer plates, the flame stabilizer plate being provided with a vent hole.

2. A linear duct burner according to claim 1, characterized in that: The fuel gas nozzle is provided with a plurality of injection holes, and a straight flow hole is arranged at the center of the fuel gas nozzle, and a horizontal flow hole is arranged around the straight flow hole.

3. A linear duct burner according to claim 1, characterized in that: Each combustion module is further provided with a steam nozzle extending into the premixing chamber of the combustion module, the steam nozzle being connected to a steam branch pipe, and steam entering the corresponding premixing chamber through the steam branch pipe.

4. A linear duct burner according to claim 1 or 3, characterized in that: A high-energy ignition gun extends into the premixing chamber of the first combustion module, and a flame monitor is arranged to monitor the first combustion module, the high-energy ignition gun being matched with the flame monitor, and the flame monitor being electrically connected to a burner control system.

5. A linear duct burner according to claim 4, characterized in that: The burner control system is further electrically connected to a temperature sensor for monitoring the temperature of the outer surface of the gas branch pipe.

6. A linear duct burner according to claim 5, characterized in that: The gas branch pipe, the steam branch pipe, the high-energy ignition gun and the flame monitor extend into the linear pipe through a pipe flange cover of the linear pipe, the pipe flange cover being provided with limiting holes corresponding to the gas branch pipe, the steam branch pipe, the high-energy ignition gun and the flame monitor, and the pipe flange cover being connected to the pipe flange of the furnace wall through bolts.

7. A linear duct burner according to claim 5 or 6, characterized in that: A fixed support assembly is further arranged in the linear pipe, the fixed support assembly comprising a support, a support seat and a fixed clamp, the support being arranged in parallel with the gas branch pipe, the support being connected to a plurality of support seats, the support seat being used for supporting the high-pressure spray gun at the outlet of the gas branch pipe and the plurality of combustion modules thereon, and the fixed clamp being used for fixing the support, the gas branch pipe, the high-pressure ignition gun and the flame monitor.

8. A linear duct burner according to claim 2, characterized in that: Each combustion module is provided with 2-3 fuel gas nozzles.

9. A linear duct burner according to claim 2 or 8, characterized in that: The straight flow hole is vertically arranged, and the horizontal flow hole forms an acute angle of 10-30° with the horizontal plane.

10. A linear duct burner according to claim 2 or 8, characterized in that: The flow rate of the horizontal flow hole accounts for 10-30%, and the flow rate of the straight flow hole accounts for 70-90%.

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