Inner telescopic integrated everlasting lamp for burner

Abstract

The utility model provides a kind of inner telescopic integrated everlasting light for burner, including ion fire detection, main flame gun, flame stabilizer, electric ignition device, everlasting light body and pneumatic propulsion device, flame stabilizer is located in the inside end section of everlasting light body, for stabilizing ignition and maintaining the sustained, efficient combustion of overall flame.The utility model integrates automatic ignition, stable combustion and ion flame detection function, with compact structure, stable combustion, strong wind interference resistance, high reliability and long service life and other advantages.

Description

Technical Field

[0001] This utility model relates to the field of combustion technology, and more specifically, to an internally retractable integrated continuous lamp for a burner. Background Technology

[0002] In high-risk industrial sectors such as petrochemicals, coal chemicals, and sulfur recovery, combustion systems are widely used in equipment such as heating furnaces and incinerators, where safety and reliability are paramount. Since the fuel medium is often a flammable and explosive gas or liquid, ignition failure or accidental flame extinguishing can easily lead to the accumulation of unburned fuel, causing deflagration or even explosions. Therefore, burners are typically equipped with a pilot burner to achieve automatic ignition and continuous, stable combustion, ensuring the safe operation of the system.

[0003] Existing continuously lit lamps generally require high ignition success rates, typically exceeding 95% on the first attempt, along with stable flames, resistance to backfire, high-temperature resistance, and long lifespan. Furthermore, to enhance automation and safety, many users also require continuously lit lamps to have automatic ignition capabilities and be equipped with flame detection devices to monitor the flame status in real time. In addition, some applications require the ignition device to automatically return to a low-temperature zone after ignition to prevent damage from prolonged exposure to high temperatures, thereby extending its service life.

[0004] Currently, there are two main types of continuous-burning lamps with propellers commonly found in the industry: the first type has a retractable lamp body that moves forward during ignition and retracts to the low-temperature zone after ignition; the second type has a fixed lamp body where only the internal electric ignition device moves back and forth via a propulsion mechanism. After successful ignition, the electric ignition device retracts independently, while the main flame continues to burn. The second type, because it does not require moving the entire combustion assembly, offers higher stability and requires less space, and is gradually becoming the mainstream development direction.

[0005] However, existing integrated continuous lights still have many problems: First, the structural layout is unreasonable, which leads to unstable installation of the ignition device and flame detection element, affecting signal reliability; second, the air and fuel are not mixed sufficiently, resulting in poor flame stability and easy occurrence of flameout, backfire, or pulsation; third, there is a lack of effective flame stabilization structure, making it difficult to adapt to various fuels and complex operating conditions; fourth, although the ignition device is retractable, its positioning accuracy is insufficient, and there is a lack of integrated fixation and protection for key components.

[0006] Chinese patent CN201611096U discloses an integrated ion flame monitoring continuous lamp, comprising a continuous lamp nozzle and a continuous lamp barrel. The continuous lamp barrel has a fuel gas inlet and an air inlet, and a fuel distributor is installed inside the continuous lamp barrel. The continuous lamp nozzle at the upper part of the barrel has a flame stabilizing head. An ion flame probe is installed inside the continuous lamp barrel, with the ion rod of the ion flame probe located at the center of the flame stabilizing head. The ion flame probe is connected to a flame monitoring control box via a high-temperature wire. This continuous lamp has a real-time monitoring function for its working status; however, it lacks a solution to the aforementioned problem.

[0007] Therefore, there is an urgent need for a new type of continuous lamp with a compact structure, high functional integration, good flame stability, retractable ignition device, and long lifespan, in order to meet the comprehensive requirements of modern industry for the safety, reliability, and miniaturization of combustion systems. Utility Model Content

[0008] The purpose of this utility model is to provide an internally retractable integrated continuous lamp for burners, which integrates automatic ignition, stable combustion and ion flame detection functions, and has the advantages of compact structure, stable combustion, strong wind resistance, high reliability and long service life.

[0009] To achieve the above objectives, this utility model provides an integrated telescopic continuous light for burners. The technical solution of this utility model is implemented as follows:

[0010] An internally telescopic integrated continuous lamp for burners includes an ionization flame detector, a main flame gun, an electric ignition device, a lamp body, and a pneumatic propulsion device. The lamp also includes a flame stabilizer plate located inside the lamp body, which is used to stabilize ignition and maintain the continuous and efficient combustion of the overall flame.

[0011] Furthermore, the flame stabilizing plate has several flame stabilizing holes near its center.

[0012] Furthermore, an air intake annular gap is formed between the outer edge of the flame stabilizer plate and the inner wall of the continuous lamp body.

[0013] Furthermore, the flame stabilizing plate is also provided with two groove structures, corresponding to the positions of the ion flame detector and the electric ignition device, respectively.

[0014] Furthermore, the flame stabilizer is located at a distance of 90mm ± 5mm from the end of the continuous lamp body.

[0015] Furthermore, the detection end face of the ion fire detector is flush with the end of the continuous lamp body.

[0016] Furthermore, the ion flame detector, main flame gun, and electric ignition device are located inside the main body of the lamp.

[0017] Furthermore, the distance between the nozzle end of the main flame gun and the end of the continuous lamp body is 50mm ± 5mm.

[0018] Furthermore, the pneumatic propulsion device is connected to the electric ignition device and is used to drive the electric ignition device to approach or move away from the end of the lamp body.

[0019] Furthermore, the electric ignition device extends forward to a position 70mm±5mm from the end of the lamp body to ignite the lamp.

[0020] Compared with existing technologies, the integrated telescopic burner lamp of this invention has the following advantages:

[0021] By incorporating a flame stabilizer plate, the air is rationally distributed into two streams, achieving staged oxygen supply and phased combustion. The air curtain formed by the annular gap airflow protects the primary flame, preventing flameout or flashback. The synergistic mechanism of "inner flame stabilizer + outer wrapping" significantly improves the stability and anti-interference capability of the flame, enabling the continuous-burning lamp to operate reliably for extended periods under complex conditions. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the continuous lamp described in Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the ever-burning lamp as described in Embodiment 1 of this utility model;

[0024] Figure 3 This is a detailed view of the end of the continuous lamp described in Embodiment 1 of this utility model;

[0025] Figure 4 This is a schematic diagram of the flame stabilizer plate described in Embodiment 1 of this utility model;

[0026] Figure 5 This is a schematic diagram of the airflow at the end of the ever-burning lamp as described in Embodiment 1 of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Ionization flame detector; 2. Flame stabilizer plate; 3. Main flame gun; 4. Electric ignition device; 5. Constant flame lamp body; 6. Mounting flange; 7. Flame detector explosion-proof junction box; 8. Flame detector cable; 9. Pneumatic propulsion device; 10. Electric ignition cable; 11. Ignition air inlet; 12. Ignition fuel gas inlet; 13. Air inlet annular gap; 14. Flame stabilizer hole; 20. Ignition fuel gas; 21. Ignition air; 22. Annular gap airflow; 23. Flame stabilizer airflow. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this utility model. The specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described in the present utility model can be combined with each other.

[0030] Example 1

[0031] This utility model provides an internally retractable integrated continuous light for burners, which integrates automatic ignition, stable combustion and ion flame detection functions. It has the advantages of compact structure, stable combustion, strong wind resistance, high reliability and long service life.

[0032] like Figures 1 to 3 As shown, the continuous lamp includes an ionization flame detector 1, a flame stabilizer plate 2, a main flame gun 3, an electric ignition device 4, a continuous lamp body 5, a mounting flange 6, a flame detector explosion-proof junction box 7, a flame detector cable 8, a pneumatic propulsion device 9, an electric ignition cable 10, an ignition air inlet 11, and an ignition fuel gas inlet 12.

[0033] The ionization flame detector 1 is located at the end of the continuous lamp, with its detection end face flush with the end of the continuous lamp body 5, and is used to monitor the flame presence status in real time. The signal from the ionization flame detector 1 is connected to the explosion-proof junction box 7 via the flame detection cable 8, and then transmitted to the control system to realize the safety interlock protection function.

[0034] The ionization flame detector 1, flame stabilizer 2, main flame gun 3, and electric ignition device 4 are located inside the lamp body 5 for easy installation at the front end of various burners. The lamp body 5 is an integral load-bearing structure, shaped like a slender tube, with an outer diameter preferably D=48~76mm, suitable for installation in compact spaces.

[0035] The main flame gun 3 is located on the central axis inside the lamp body 5. The distance between the nozzle end of the main flame gun 3 and the end of the lamp body 5 is L1, preferably L1 = 50mm ± 5mm. The main flame gun 3 is used to deliver ignition fuel gas 20 and forms a high-speed jet at the end nozzle.

[0036] The electric ignition device 4 is located on one side of the main flame gun 3 and is connected to the pneumatic propulsion device 9. During ignition, the pneumatic propulsion device 9 drives the electric ignition device 4 to extend forward to a position L2 from the end of the constant-burn lamp body 5 for spark ignition, preferably L2 = 70mm ± 5mm. After ignition, the electric ignition device 4 automatically retracts to the low-temperature zone to avoid damage from prolonged exposure to high temperatures. The main flame gun 3 remains stationary, always maintaining combustion to ensure continuous and reliable operation. The power supply for the electric ignition device 4 is connected to an external ignition controller via the electric ignition cable 10.

[0037] The electric ignition device 4 and the ion flame detector 1 are arranged closely around the central main flame gun 3. Preferably, the minimum distance between each component does not exceed 15mm.

[0038] A mounting flange 6 is provided at the front end of the continuous lamp to fix the entire device to the burner. Ignition air 21 enters through ignition air inlet 11 and flows towards the end along the annular channel between the outer wall of the main flame gun 3 and the inner wall of the continuous lamp body 5. Ignition fuel gas 20 enters through ignition fuel gas inlet 12, is transported through the internal flow channel of the main flame gun 3, and is ejected at the nozzle.

[0039] The pneumatic propulsion device 9 is connected to the electric ignition device 4 and is used to drive the electric ignition device 4 to approach or move away from the end of the lamp body 5.

[0040] like Figure 4 As shown, the flame stabilizer 2 is an annular plate structure with a circular outer edge. A circular through-hole is located at the center of the flame stabilizer 2 to accommodate the main flame gun 3 and ensure smooth flow of fuel gas. A continuous air intake annular gap 13 is formed between the outer edge of the flame stabilizer 2 and the inner wall of the lamp body 5. This annular gap serves as a high-speed airflow channel, allowing the ignition air 21 to flow along the annular direction, cooling and disturbing the periphery of the flame, thus enhancing combustion stability.

[0041] Near the center of the flame stabilizer plate 2, several flame stabilizing holes 14 are provided. The flame stabilizing holes 14 are symmetrically distributed, preferably four or six small circular holes with a diameter ranging from 3 to 6 mm. They are evenly distributed around the main flame gun 3 to guide part of the ignition air 21 through, forming a centripetal flame stabilizing airflow. After this airflow mixes with the fuel gas ejected from the main flame gun 3, a stable ignition core is formed near the nozzle, achieving efficient ignition and continuous combustion.

[0042] In addition, the flame stabilizer 2 is provided with two semi-circular arc-shaped groove structures, corresponding to the positions of the ion flame detector 1 and the electric ignition device 4, respectively. Preferably, the ion flame detector 1 is located at an eccentric position above the flame stabilizer 2, with its detection end face facing the flame area; the electric ignition device 4 is located below, and can be driven by the pneumatic propulsion device 9 to extend forward to the ignition position through the groove.

[0043] The flame stabilizer 2 is located at a distance L3 from the end of the lamp body 5, preferably L3 = 90mm ± 5mm. An annular air intake gap 13 is formed between the flame stabilizer 2 and the lamp body 5. The air intake gap 13 cooperates with the flame stabilizing hole 14 to divide the ignition air 21 into two independent airflows: one part passes through the flame stabilizing hole 14 to form a flame stabilizing airflow 23, and the other part passes through the air intake gap 13 to form an annular gap airflow 22.

[0044] like Figure 5As shown, the ignition fuel gas 20 flows at high speed along the internal flow channel of the main flame gun 3 to the end and is ejected from the nozzle. At the same time, the ignition air 21 flows forward in the annular channel between the outer wall of the main flame gun and the inner wall of the lamp body 5. When the ignition air 21 reaches the position of the flame stabilizer 2, the air is divided into two streams due to the obstruction of the flame stabilizer 2: one part flows in through the flame stabilizing hole 14 on the flame stabilizer 2, forming the flame stabilizing airflow 23; the other part can only pass through the air inlet annular gap 13 on the outside of the flame stabilizer 2, forming a high-speed annular gap airflow 22.

[0045] The stabilizing airflow 23 approaches the center of the main flame gun 3, where it first contacts, mixes with, and combusts the ejected fuel gas, forming the primary combustion zone. This zone is located at the flame core, and because it is surrounded by a high-speed annular airflow 22, it forms a relatively closed and stable combustion environment. External airflow disturbances are unlikely to affect its combustion process, so the primary combustion is very stable and can continuously provide a reliable ignition source.

[0046] As combustion continues, the annular airflow 22 gradually diffuses inward after passing the primary combustion zone, while the unburned fuel gas in the center also diffuses outward. The two mix further in a more distant region, entering the secondary complete combustion stage. Since the primary combustion has established a stable high-temperature flame core, it can continuously ignite the subsequent mixture, thus ensuring the stability of the secondary combustion.

[0047] Throughout the process, the flame stabilizer 2 plays a crucial role. It not only rationally distributes the air into two airflows, achieving staged oxygen supply and phased combustion, but also protects the primary flame through the air curtain formed by the annular airflow 22, preventing flameout or backfire. This synergistic mechanism of "inner flame stabilization + outer wrapping" significantly improves the stability and anti-interference ability of the flame, enabling the continuous lamp to operate reliably for a long time under complex conditions.

[0048] According to fluid mechanics principles, the volumetric flow rate satisfies the continuity equation: Q = v•A. Here, Q is the constant ignition air flow rate, v is the flow velocity, and A is the flow cross-sectional area. When the ignition air 21 passes through the flame stabilizer 2, the flow area decreases sharply, leading to a rapid increase in flow velocity. By optimizing the design of the number and shape of the flame stabilizer holes 14 and the geometry of the inlet annular gap 13, the flow velocities of the two airflows can be controlled within the optimal range. This avoids both incomplete combustion and flameout risks caused by excessively high flow velocities, and flame adhesion to the wall or backfire problems caused by excessively low flow velocities.

[0049] The flame stabilizer plate 2 not only participates in air diversion, but also acts as a mechanical support to press and fix the ion fire detector 1, flame stabilizer plate 2, main flame gun 3 and electric ignition device 4, preventing relative displacement or loosening during operation and improving the overall structural rigidity and anti-interference ability.

[0050] The integrated continuous-fire lamp described in this embodiment combines stable combustion, automatic ignition, and ionization flame detection functions into one unit. It features a compact, built-in design and is suitable for heat loads of approximately 35kW. Practical applications show that it achieves a first-time ignition success rate of over 95%, exhibiting excellent combustion stability, wind resistance, and long service life. It is particularly suitable for industrial combustion systems with high safety requirements, such as those used in petrochemical, coal chemical, and sulfur recovery industries.

[0051] It should be noted that all terms used in this utility model to indicate direction and position, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "lower", "end", "head", "center", etc., are only used to explain the relative positional relationship and connection between the components in a specific state, and are only for the convenience of describing this utility model, and are not required to require this utility model to be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A retractable integrated continuous lamp for a burner, comprising an ionization flame detector (1), a main flame gun (3), an electric ignition device (4), a continuous lamp body (5), and a pneumatic propulsion device (9), characterized in that, The lamp also includes a flame stabilizer (2), which is located inside the lamp body (5) and is used to stably ignite and maintain the continuous and efficient combustion of the overall flame.

2. The ever-burning lamp according to claim 1, characterized in that, The flame stabilizing plate (2) has several flame stabilizing holes (14) near its center.

3. The ever-burning lamp according to claim 1, characterized in that, An air intake annular gap (13) is formed between the outer edge of the flame stabilizer plate (2) and the inner wall of the lamp body (5).

4. The ever-burning lamp according to claim 1, characterized in that, The flame stabilizer plate (2) is also provided with two groove structures, which correspond to the positions of the ion flame detector (1) and the electric ignition device (4), respectively.

5. The ever-burning lamp according to claim 1, characterized in that, The flame stabilizer plate (2) is located at a distance of 90mm ± 5mm from the end of the lamp body (5).

6. The ever-burning lamp according to claim 1, characterized in that, The detection end face of the ion fire detector (1) is flush with the end of the lamp body (5).

7. The ever-burning lamp according to claim 1, characterized in that, The ion flame detector (1), the main flame gun (3) and the electric ignition device (4) are located inside the lamp body (5).

8. The ever-burning lamp according to claim 1, characterized in that, The distance between the nozzle end of the main flame gun (3) and the end of the lamp body (5) is 50mm ± 5mm.

9. The ever-burning lamp according to claim 1, characterized in that, During the ignition process, the pneumatic propulsion device (9) is connected to the electric ignition device (4) to drive the electric ignition device (4) to approach or move away from the end of the lamp body (5).

10. The ever-burning lamp according to claim 1, characterized in that, The electric ignition device (4) extends forward to a position 70mm ± 5mm from the end of the lamp body (5) to ignite.

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