High-speed low-nitrogen self-preheating burner

Abstract

The utility model discloses a high-speed low-nitrogen self-preheating burner which comprises a burner outer shell, a protective lining is installed in the burner outer shell, a tubular heat exchanger and a burner pipeline are installed in a heat storage inner container structure, a gas flow control mechanism is installed at the rear end of the burner pipeline, and a gas flow control mechanism is installed at the rear end of the burner pipeline. A flow sensor and a flow control valve are installed in the gas flow control mechanism. The tubular heat exchanger is adopted, smoke flows in the tube, air or fuel gas flows outside the tube, heat transfer is achieved in a heat conduction and convection mode, after preheated air or fuel gas enters the combustor, the ignition temperature of fuel can be reduced, the combustion speed and efficiency are improved, an accurate fuel gas flow control device is arranged, and the combustion efficiency is improved. And the flow sensor and the controller are adopted to monitor and control the flow of the fuel gas in real time, so that the burner always operates under the optimal combustion working condition, and the waste of the fuel gas is avoided.

Description

A high-speed, low-NOx self-preheating burner Technical Field

[0001] This utility model relates to the field of burner technology, specifically a high-speed, low-nitrogen self-preheating burner. Background Technology

[0002] Natural gas is a non-renewable clean energy source. With the acceleration of human industrialization, the demand for natural gas is increasing, making it an urgent issue to improve the thermal energy utilization efficiency of natural gas. In the field of open flame heating, traditional finned self-preheating burners have limited heat recovery capabilities due to their limited heat exchange area, especially in low-temperature furnaces where efficient heat recovery is even more difficult due to the low furnace temperature.

[0003] Chinese patent document CN212227808U discloses a self-preheating burner tube bundle heat exchanger and a self-preheating burner. The self-preheating burner tube bundle heat exchanger includes an outer tube and an inner tube. One end of the inner tube extends outside the outer tube, and the other end extends into the outer tube. The inner tube consists of an inner tube opening, an inner tube wall, and an inner tube outer opening, with the inner tube opening located inside the outer tube. The outer tube consists of an outer tube bottom, an outer tube wall, and an outer tube opening. A gap is provided between the inner tube opening and the outer tube bottom, forming a fluid flow channel between the inner tube and the outer tube. This invention increases the heat exchange area between flue gas and combustion air, achieving efficient heat recovery.

[0004] The existing technologies mentioned above have low heat transfer efficiency of the burners, resulting in high required ignition temperatures. They also cannot monitor and adjust the gas flow rate in real time, leading to low combustion efficiency. Therefore, it is necessary to develop a high-speed, low-NOx self-preheating burner. Summary of the Invention

[0005] The purpose of this invention is to provide a high-speed, low-NOx self-preheating burner to solve the problems mentioned in the background art, such as the low heat transfer efficiency of the burner, which leads to a high required ignition temperature, the inability to monitor and adjust the gas flow rate in real time, and the low combustion efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-speed, low-NOx self-preheating burner, comprising a burner shell, a protective liner installed inside the burner shell, a heat storage liner structure installed inside the protective liner, a tubular heat exchanger and a burner pipe installed inside the heat storage liner structure, a gas flow control mechanism installed at the rear end of the burner pipe, and a flow sensor and a flow control valve installed inside the gas flow control mechanism.

[0007] Preferably, the gas flow control mechanism and the burner pipe are detachable.

[0008] Preferably, one end of the flow sensor is sealed to the burner pipe via a lock nut.

[0009] Preferably, a fixing ring groove is provided on the other end surface of the flow sensor, and a sealing ring is installed on the surface of the fixing ring groove.

[0010] Preferably, the flow control valve and the flow sensor are fixed together by threads or snap-fit.

[0011] Preferably, the flow control valve has fixed shaft holes at both ends, and a valve switch is fixedly connected inside the fixed shaft holes by a shaft pin.

[0012] Preferably, the interior of the heat-storing inner liner structure is provided with a metal heat-conducting structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention employs a tubular heat exchanger, where flue gas flows inside the tubes and air or fuel gas flows outside. Heat is transferred through conduction and convection. After preheating, the air or fuel gas enters the burner, reducing the fuel's ignition temperature and increasing combustion speed and efficiency. Equipped with a precise fuel flow control device, using a flow sensor and controller, the gas flow is monitored and controlled in real time, ensuring the burner always operates under optimal combustion conditions and preventing fuel waste. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 is a side view of the present invention.

[0017] Figure 3 is a schematic diagram of a partial installation structure of this utility model;

[0018] Figure 4 is an exploded view of the gas flow control mechanism of this utility model.

[0019] In the diagram: 1. Burner housing; 2. Tubular heat exchanger; 3. Protective lining; 4. Burner pipe; 5. Heat storage tank structure; 6. Gas flow control mechanism; 7. Flow sensor; 8. Sealing ring; 9. Fixing shaft hole; 10. Shaft pin; 11. Valve switch; 12. Locking nut; 13. Fixing ring groove; 14. Flow control valve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please refer to Figures 1-4. One embodiment of this utility model is a high-speed, low-NOx self-preheating burner, which includes a burner shell 1, a protective liner 3 installed inside the burner shell 1, a heat storage liner structure 5 installed inside the protective liner 3, a tubular heat exchanger 2 and a burner pipe 4 installed inside the heat storage liner structure 5, a gas flow control mechanism 6 installed at the rear end of the burner pipe 4, and a flow sensor 7 and a flow control valve 14 installed inside the gas flow control mechanism 6.

[0022] Furthermore, the gas flow control mechanism 6 and the burner pipe 4 are detachable, which has the advantages of convenient and quick installation and disassembly, and can be used to quickly install and fix the gas flow control mechanism 6.

[0023] Furthermore, one end of the flow sensor 7 is sealed to the burner pipe 4 via a locking nut 12, which is used for quick installation and fixation between the flow sensor 7 and the burner pipe 4.

[0024] Furthermore, a fixing ring groove 13 is provided on the other end surface of the flow sensor 7, and a sealing ring 8 is installed on the surface of the fixing ring groove 13, which is convenient for sealing and protecting the connection between the flow sensor 7 and the flow control valve 14 to prevent gas leakage.

[0025] Furthermore, the flow control valve 14 and the flow sensor 7 are fixed together by threads or snap-fit, which facilitates quick sealing and alignment installation between the flow control valve 14 and the flow sensor 7.

[0026] Furthermore, the flow control valve 14 is provided with fixed shaft holes 9 at both ends. A valve switch 11 is fixedly connected inside the fixed shaft hole 9 by a shaft pin 10, which facilitates the quick installation and fixing of the valve switch 11 and makes it easy to control the flow control valve 14.

[0027] Furthermore, the heat storage inner liner structure 5 is equipped with a metal heat-conducting structure, which has the advantages of high heat conduction efficiency and good heat storage and insulation effect.

[0028] Working Principle: During use, a protective liner 3 is installed inside the burner outer shell 1. Inside the protective liner 3 is a heat storage inner tank structure 5. The heat storage inner tank structure 5 houses a tubular heat exchanger 2 and a burner pipe 4. The protective liner 3 and the heat storage inner tank structure 5 provide advantages such as high heat transfer efficiency and good heat storage and insulation during burner combustion. Using the tubular heat exchanger 2, flue gas flows inside the tube, while air or fuel gas flows outside. Heat transfer is achieved through heat conduction and convection. Preheated air or fuel gas entering the burner reduces the fuel ignition temperature and increases combustion speed and efficiency. A fuel flow control mechanism 6 is installed at the rear end of the burner pipe 4. The flow control mechanism 6 is internally equipped with a flow sensor 7 and a flow control valve 14. One end of the flow sensor 7 is sealed to the burner pipe 4 via a locking nut 12 for quick installation and fixation. The other end of the flow sensor 7 has a fixing ring groove 13, and a sealing ring 8 is installed on the surface of the fixing ring groove 13 to facilitate sealing and protection of the connection between the flow sensor 7 and the flow control valve 14, preventing gas leakage. Equipped with a precise gas flow control device, using the flow sensor 7 and the flow control valve 14, the flow rate of the gas is monitored and controlled in real time, ensuring that the burner always operates under optimal combustion conditions and avoiding gas waste.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment are all conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, and will not be described in detail here.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-speed, low-NOx self-preheating burner, comprising a burner housing (1), characterized in that, The burner housing (1) is equipped with a protective liner (3), and the protective liner (3) is equipped with a heat storage liner structure (5). The heat storage liner structure (5) is equipped with a tubular heat exchanger (2) and a burner pipe (4). The burner pipe (4) is equipped with a gas flow control mechanism (6) at its rear end. The gas flow control mechanism (6) is equipped with a flow sensor (7) and a flow control valve (14).

2. The high-speed, low-NOx self-preheating burner according to claim 1, characterized in that: The gas flow control mechanism (6) and the burner pipe (4) are detachable.

3. The high-speed, low-NOx self-preheating burner according to claim 1, characterized in that: One end of the flow sensor (7) is sealed to the burner pipe (4) via a locking nut (12).

4. A high-speed, low-NOx self-preheating burner according to claim 3, characterized in that: The other end surface of the flow sensor (7) is provided with a fixing ring groove (13), and a sealing ring (8) is installed on the surface of the fixing ring groove (13).

5. A high-speed, low-NOx self-preheating burner according to claim 1, characterized in that: The flow control valve (14) and the flow sensor (7) are fixed together by thread or snap-fit.

6. A high-speed, low-NOx self-preheating burner according to claim 1, characterized in that: The flow control valve (14) has fixed shaft holes (9) at both ends, and a valve switch (11) is fixedly connected inside the fixed shaft holes (9) by a shaft pin (10).

7. A high-speed, low-NOx self-preheating burner according to claim 1, characterized in that: The heat storage inner liner structure (5) is equipped with a metal heat-conducting structure inside.

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