High-temperature crystal ignition device and method for coke oven ascension pipe

Abstract

The invention relates to the technical field of coke oven gas treatment, in particular to a high-temperature crystal ignition device and method for a coke oven riser. Comprising a voltage-adjustable isolation transformer used for converting input AC voltage into 7-12V adjustable low-voltage DC or AC output; a nano ceramic crystal heating body is arranged in the nano ceramic crystal ignition gun, and the ignition gun is electrically connected with the output end of the transformer; the stable combustion protection bracket is used for bearing and fixing the ignition gun and is provided with an adjustable mounting structure and a windproof stable combustion cover; the high-temperature-resistant junction box and the high-temperature-resistant control cable are used for realizing electrical connection among all parts in the device; and the current detection unit is used for detecting the working current state of a loop where the nano ceramic crystal ignition gun is located and outputting a corresponding detection signal. The device can adapt to high-temperature, dusty and highly corrosive severe environments, and has the advantages of quick response, ultra-long service life, intelligent monitoring and easiness in maintenance.

Description

Technical Field

[0001] This invention relates to the field of coke oven gas treatment technology, specifically to a high-temperature crystal ignition device and method for coke oven riser pipes. Background Technology

[0002] During coke oven production, the raw coal gas overflowing from the riser pipe needs to be ignited promptly and reliably to eliminate the safety hazards, environmental pollution, and energy waste caused by its direct emission. Therefore, the performance of the ignition device is directly related to the continuity, safety, and environmental performance of the coke oven operation.

[0003] Currently, the ignition technologies applied to this scenario have the following limitations: 1. Poor environmental adaptability of flame igniters: Traditional open flame ignition methods rely on a continuously burning flame as the ignition source. Their core drawback lies in their extreme susceptibility to severe weather conditions commonly found at the top of coke ovens, such as high wind speeds, rain, snow, and high humidity. Under strong wind conditions, the ignition flame may be blown off course or even extinguished, leading to delayed ignition or complete failure. In humid environments, flame stability decreases, significantly reducing the ignition success rate. This seriously affects the process requirements for continuous and stable production of coke ovens around the clock.

[0004] 2. Insufficient lifespan and reliability of electric heating wire ignition guns: To replace open flames, electric heating wire ignition guns using resistance wire (such as iron-chromium-aluminum alloy wire) as the heating element have emerged. However, the environment around the coke oven riser pipe is extremely harsh, with long-term exposure to high temperatures (usually above 500℃), high dust levels, and a raw coal gas atmosphere containing corrosive components such as hydrogen sulfide. Under these conditions, the surface of the metal heating wire is highly susceptible to high-temperature oxidation, leading to a reduction in effective cross-section, increased resistance, decreased heating efficiency, and ultimately breakage due to embrittlement. Its lifespan is typically short, requiring frequent shutdowns for replacement, which not only increases maintenance costs and spare parts consumption but also impacts overall production efficiency due to unplanned downtime.

[0005] 3. Lack of systematic protection and modular design: Existing devices often focus on the single function of ignition, generally lacking systematic protection design for complex industrial environments. Specifically: (a) Fixed structure, making installation angle adjustment difficult and hindering optimization of the ignition position based on site conditions; (b) Lack of effective integrated protective covers against wind, dust, and heat radiation, resulting in significant external interference during the ignition process; (c) Insufficient protection levels for electrical connection components (such as junction boxes), making them vulnerable to high temperatures, dust, and moisture; (d) Non-modular overall structure, with complex connections between components. When a fault occurs, on-site troubleshooting is difficult, and maintenance or replacement requires significant time, leading to low system availability and high operation and maintenance costs.

[0006] In summary, existing coke oven riser ignition technology has significant shortcomings in three aspects: ignition reliability, lifespan of core components, and system maintainability, and cannot meet the growing demands of the modern coking industry for high-efficiency, safe, environmentally friendly, and low-maintenance production. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention provides a high-temperature crystal ignition device and method for coke oven riser pipes, which can adapt to harsh environments with high temperature, dust, and strong corrosion, and has the advantages of rapid response, ultra-long life, intelligent monitoring and easy maintenance.

[0008] To achieve the above objectives, the present invention employs the following technical solution: A high-temperature crystal ignition device for a coke oven riser pipe includes: an adjustable voltage isolation transformer for converting input AC voltage into a 7-12V adjustable low-voltage DC or AC output; a nano-ceramic crystal ignition gun with a nano-ceramic crystal heating element inside, the nano-ceramic crystal ignition gun being electrically connected to the output terminal of the adjustable voltage isolation transformer; a flame-stabilizing and protective bracket for supporting and fixing the nano-ceramic crystal ignition gun, which has an adjustable mounting structure and a windproof and flame-stabilizing cover; a high-temperature resistant junction box and a high-temperature resistant control cable for realizing the electrical connection between the various components in the device; and a current detection unit for detecting the operating current status of the circuit where the nano-ceramic crystal ignition gun is located and outputting a corresponding detection signal.

[0009] Furthermore, the adjustable voltage isolation transformer includes an inner stainless steel shell, an intermediate heat insulation layer, and an outer stainless steel protective shell arranged sequentially from the inside to the outside; the intermediate heat insulation layer is a nano-aerogel felt.

[0010] Furthermore, the nano-ceramic crystal ignition gun includes a gun head, a gun body, and a junction box connected in sequence; the nano-ceramic crystal heating element is disposed inside the gun head, and the front end of the gun head is provided with multiple vent holes arranged in a ring array; the gun body is bent and includes an inner heat insulation layer and a gun barrel sleeved on the outside, with a gap between the inner heat insulation layer and the gun barrel; the junction box is disposed at the rear of the gun body and is used to connect the high-temperature resistant control cable.

[0011] Furthermore, the nano-ceramic crystal heating element is a nitride-based or oxide-based nano-ceramic crystal doped with rare earth metal oxides.

[0012] Furthermore, the axes of the plurality of vent holes are inclined relative to the axis of the gun head.

[0013] Furthermore, the inner heat insulation layer includes a ceramic sleeve and a ceramic fiber layer covering it; the gun barrel is a stainless steel tube with a heat-resistant coating on its surface.

[0014] Furthermore, the flame stabilizing and protective support includes a detachably connected upper frame and a lower frame; the upper frame is provided with the windproof and flame stabilizing cover and an installation pipe for installing the nano-ceramic crystal ignition gun; the lower frame has an installation structure for connecting to the coke oven riser flange.

[0015] The nano-ceramic crystal ignition gun is inserted into the installation tube and fixed with screws. The bottom of the lower frame is U-shaped, with bolts on the bottom edge. The middle part is inserted into the side of the coke oven riser pipe, and the bottom is fixed to the flange of the coke oven riser pipe by tightening bolts.

[0016] Furthermore, the high-temperature resistant junction box has a cast aluminum shell and ceramic terminals, with a protection level of not less than IP66; the high-temperature resistant control cable has a fluoroplastic insulation layer and a mica wrapping layer.

[0017] Furthermore, the current detection unit is configured to: determine a disconnection fault when the detected loop current is 0A; determine an underload fault when the detected loop current is continuously lower than 0.5A; determine an overload fault when the detected loop current is continuously higher than 5A; and output an analog signal of 4-20mA and / or a switch alarm signal accordingly.

[0018] An ignition method using the above-mentioned high-temperature crystal ignition device includes the following steps: 1) Adjust the output voltage of the adjustable isolation transformer to the set value to match the current gas concentration; 2) Install and fix the flame stabilizing and protective bracket at the predetermined position on the coke oven riser pipe, and install the nano-ceramic crystal ignition gun on the flame stabilizing and protective bracket, and adjust its angle; 3) Power on the nano-ceramic crystal ignition gun to instantly heat its heating element to the ignition temperature, thereby igniting the raw coal gas overflowing from the riser pipe; 4) The ignition circuit current is monitored in real time through the current detection unit, and an alarm is triggered when the current is abnormal.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. It achieves efficient and reliable ignition, completely overcoming environmental interference.

[0020] The core of this invention lies in using a nano-ceramic crystal heating element as the ignition source. This material possesses extremely high thermal response characteristics; upon being energized, its surface temperature can rapidly rise to over 800°C in a very short time, achieving near-zero-delay instantaneous ignition. Compared to traditional flame igniters that rely on open flames and are susceptible to ignition failure due to wind and rain, the ignition process of this invention is completely independent of the stability of an external flame, thereby increasing the ignition success rate to over 99% and ensuring the continuous and stable operation of the coke oven under various adverse weather conditions.

[0021] 2. The lifespan of key components is greatly extended, significantly reducing maintenance frequency and costs.

[0022] To address the issues of oxidation and embrittlement of traditional heating wires, the heating element of the ignition gun described in this invention utilizes ZrO2-based (or similar) nano-ceramic crystals with a temperature resistance exceeding 1200℃. Its physicochemical properties are extremely stable, exhibiting virtually no degradation even in high-temperature and corrosive gas environments. Simultaneously, the adjustable voltage isolation transformer employs a "three-stage heat insulation" structure with a double-layer stainless steel shell sandwiching nano-aerogel felt, along with the bent design of the ignition gun body and the gap between the inner insulation layer and the outer barrel. Together, these elements constitute a highly efficient thermal management system, ensuring the long-term safe operation of internal electrical components under high-temperature external environments. These combined designs extend the service life of the core ignition components by more than five times compared to traditional heating wire solutions, significantly reducing the frequency of spare parts replacements and downtime for maintenance.

[0023] 3. It has intelligent monitoring and early warning capabilities, which improves system security and maintainability.

[0024] This invention integrates a current detection unit, enabling real-time and accurate monitoring of the ignition circuit's operating current. By setting logic (such as open circuit, underload, and overload), this unit can instantly determine whether the system is in normal operating condition. Once an anomaly is detected (e.g., zero current indicating a broken circuit, excessively low current indicating a possible ignition gun malfunction, and excessively high current indicating a short circuit), an alarm signal is immediately output to the control system. This function transforms the approach from "post-fault maintenance" to "condition-based early warning," effectively preventing direct emissions of raw gas due to ignition failure, and allowing maintenance personnel to conduct targeted repairs, significantly reducing the difficulty and cost of troubleshooting.

[0025] 4. The overall design adopts a modular and protective approach, making installation and maintenance convenient and enhancing system adaptability.

[0026] This invention embodies a modular design philosophy. The flame stabilization and protection bracket features a detachable, split upper and lower section, integrating a windproof and flame-stabilizing cover. This not only allows for flexible installation and adjustable angles but also effectively resists lateral wind disturbance, protecting the stability of the ignition flame. The high-temperature resistant junction box boasts an IP66 high protection rating and a cast aluminum ceramic structure, ensuring the long-term reliability of electrical connection nodes. These modular components all support rapid individual disassembly and replacement. When a component requires maintenance, the entire system can be maintained without disassembling it, minimizing downtime caused by fault handling. This design significantly improves the field applicability and operational economy of the entire system.

[0027] In summary, this invention systematically solves the three major pain points of traditional ignition technology—low reliability, short lifespan, and difficult maintenance—through material innovation, structural optimization, and intelligent integration. It provides a high-temperature crystal ignition solution that is adaptable to extreme coke oven conditions, efficient, long-lasting, intelligent, and easy to maintain. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention.

[0029] Figure 2 This is a schematic diagram of the three-dimensional explosion structure of the flame-stabilizing protective bracket and the nano-ceramic crystal ignition gun of the present invention.

[0030] Figure 3 This is a schematic front view of the structure of the nano-ceramic crystal ignition gun of the present invention.

[0031] Figure 4 This is a block diagram of the current detection circuit of the present invention.

[0032] The markings in the diagram are: 1. Adjustable voltage isolation transformer; 2. Nano-ceramic crystal ignition gun; 3. Flame stabilizing and protective bracket; 4. High-temperature resistant junction box; 5. High-temperature resistant control cable; 21. Nano-ceramic crystal heating element; 22. Gun head; 23. Vent hole; 24. Inner heat insulation layer; 25. Gun barrel; 26. Junction box; 31. Upper frame; 32. Lower frame; 33. Windproof and flame stabilizing cover; 34. Mounting pipe. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The following is in conjunction with the appendix Figure 1-4 The specific embodiments of the present invention will be described in further detail below.

[0035] like Figure 1As shown in the figure, the high-temperature crystal ignition device for coke oven riser pipe provided in this embodiment of the invention comprises the following core system components: an adjustable voltage isolation transformer 1, a nano-ceramic crystal ignition gun 2, a flame stabilizing and protective bracket 3, a high-temperature resistant junction box 4, a high-temperature resistant control cable 5, and an integrated current detection unit (not shown separately in the figure, but usually built into the junction box 4 or an independent module). These components are electrically connected through the high-temperature resistant control cable 5, forming a complete ignition and monitoring system.

[0036] 1. Adjustable voltage isolation transformer (high temperature crystal igniter) The adjustable isolation transformer 1 is the core of the device's power and control system. Its function is to convert the input AC220V mains power into an adjustable low-voltage (DC or AC) output within the range of 7-12V. This adjustable feature allows the device to flexibly adapt to raw coal gas of different concentrations and flow rates. By adjusting the output voltage, the heating power of the nano-ceramic crystal igniter 2 can be changed, thereby optimizing the ignition effect.

[0037] To withstand the high-temperature environment near the coke oven, this transformer employs a unique three-stage heat insulation design. Its structure, from the inside out, consists of: Inner layer: The housing is made of 304 stainless steel with a temperature resistance of not less than 1000℃, which is used to protect the internal electrical components.

[0038] Intermediate layer: Filled with nano-aerogel felt as a thermal insulation layer. This material has an extremely low thermal conductivity (<0.02W / m·K), which can effectively block the conduction of external high temperature to the interior.

[0039] Outer layer: Also made of 304 stainless steel protective shell, providing mechanical protection and sealing.

[0040] 2. Nano-ceramic crystal ignition gun like Figure 1-3 As shown, the nano-ceramic crystal ignition gun 2 is a key component that directly performs the ignition function. It is connected to the output terminal of the adjustable voltage isolation transformer 1 via a high-temperature resistant control cable 5.

[0041] The specific structure of the nano-ceramic crystal ignition gun 2 includes: The nozzle 22 is a porous protective structure made of high-temperature resistant stainless steel. A nano-ceramic crystal heating element 21 is tightly installed inside. This heating element is preferably a ZrO2-based nano-ceramic doped with rare earth metal oxides (such as Y2O3), but can also be other nitride-based or oxide-based nano-ceramic crystals. This material possesses extremely high thermal stability and electrical conductivity, and can rapidly heat to over 800°C within 2 seconds after being energized, achieving instantaneous ignition. The front end of the nozzle 22 has multiple vent holes 23 arranged in a ring array. The axes of these vent holes 23 are not perpendicular to the nozzle axis, but are inclined at an angle of 13° to 17°. This design allows air and gas to form a swirling flow, which is more conducive to mixing and stable ignition.

[0042] Gun Body: The overall shape is bent (approximately L-shaped) to adapt to the installation space and direct the heat-generating components to the optimal ignition position. The gun body adopts a composite heat insulation structure, including an inner heat insulation layer 24 and a barrel 25 sleeved on the outside, with a gap between the two to form an air heat insulation layer. The inner heat insulation layer 24 is composed of a high-purity alumina double-hole ceramic sleeve and a ceramic fiber paper covering it, providing core heat insulation protection. The barrel 25 is a stainless steel tube with a heat-resistant coating to resist environmental corrosion and heat radiation.

[0043] Junction box 26: A modular design located at the rear of the gun body. It serves as an electrical interface for quick and reliable connection of the high-temperature control cable 5 from junction box 4.

[0044] 3. Flame stabilizing and protective bracket like Figure 1 and Figure 2 As shown, the flame stabilizing and protective bracket 3 is used to securely install and precisely position the nano-ceramic crystal ignition gun 2 on the side of the coke oven riser pipe. Its design emphasizes modularity, adjustability, and protection.

[0045] Structural Composition: The bracket adopts a split, quick-release design, comprising an upper frame 31 and a lower frame 32. The lower frame 32 has a row of vertical mounting holes. The upper frame 31 and the lower frame 32 are connected by bolts. By using mounting holes at different heights for connection, this design allows the overall height to be adjusted within a certain range.

[0046] Upper frame 31: The top is integrated with a semi-enclosed windproof and flame-stabilizing cover 33, which can effectively reduce the direct interference of lateral wind and rain on the ignition flame. A mounting tube 34 is provided on one side of the windproof and flame-stabilizing cover 33. The gun body of the nano-ceramic crystal ignition gun 2 is inserted into this tube and fixed and finely adjusted in angle by set screws or screws. The gun head 22 of the nano-ceramic crystal ignition gun 2 is located inside the windproof and flame-stabilizing cover 33.

[0047] Lower frame 32: Its bottom is designed as a "C" - shaped structure, and bolts are preset at the bottom edge. During installation, the lower frame 32 is "clamped" on the side of the riser pipe of the coke oven, and then it is fastened to the flange of the riser pipe itself by rotating the bolts, ensuring that the entire bracket remains stable in a vibrating environment.

[0048] 4. High - temperature resistant distribution box and cables High - temperature resistant distribution box 4 (see Figure 1 ) : It adopts an aluminum - casting shell and ceramic terminal blocks, ensuring excellent heat dissipation and electrical insulation. Its protection level reaches IP66, which can completely prevent dust intrusion and strong water spraying. It can work at a temperature not lower than 300℃ for a long time, meeting the requirements of the high - temperature and dusty environment of the coke oven.

[0049] High - temperature resistant control cable 5: Connects each component. Its insulating layer is made of fluoroplastics, and mica tape is wrapped around the outside as a fire - resistant layer. This cable has excellent high - temperature resistance and corrosion resistance, and can withstand a high temperature of 250℃ in the short term.

[0050] 5. Current detection unit This unit is connected in series in the main circuit from the adjustable - voltage isolation transformer 1 to the nano - ceramic crystal ignition gun 2. Its circuit principle block diagram is as shown in Figure 4 . Its core function is to intelligently monitor the working state of the system. The specific logic configuration is as follows: Real - time collect the working current value in the loop.

[0051] Fault diagnosis: When the loop current detected is 0A, it is determined as a disconnection fault; when the current continuously drops below 0.5A, it is determined as an under - load fault (which may indicate the aging or poor contact of the ignition gun); when the current continuously rises above 5A, it is determined as an over - load or short - circuit fault.

[0052] Signal output: According to the detection results, simultaneously output an analog signal of 4 - 20mA (for uploading to the DCS / PLC system for real - time display and recording) and a digital dry - contact signal (for directly triggering an audible and visual alarm or interlocking shutdown).

[0053] The working method (ignition method) of the device of the present invention mainly includes the following steps: Step 1: Installation and commissioning First, according to the on - site gas conditions, adjust the output voltage of the adjustable - voltage isolation transformer 1 to a suitable set value (for example, 10V). Then, firmly install and fix the stable - combustion protection bracket 3 at the predetermined position of the riser pipe of the coke oven through its lower frame 32. Next, insert the nano - ceramic crystal ignition gun 2 into the installation pipe 34 of the upper frame 31 of the bracket, adjust its extension length and angle so that the gun head 22 is facing the gas overflow area, and finally fasten it.

[0054] Step 2: Start ignition After installation and verification of wiring, power is supplied to the system. The adjustable isolation transformer 1 outputs a set low voltage, and the current flows through the heating element 21 of the nano-ceramic crystal ignition gun 2. Based on the properties of its nano-ceramic material, the heating element 21 generates a high temperature (≥800℃) upon power-on, immediately igniting the raw coal gas overflowing from the riser pipe and flowing through the vent 23 of the gun head.

[0055] Step 3: Intelligent Monitoring and Maintenance During device operation, the current detection unit works continuously. It monitors the current in the ignition circuit in real time and feeds back the status signal to the control room. Operators can monitor the system status through the monitoring interface. Once the current value exceeds the normal range, the unit will immediately issue an alarm signal to prompt maintenance personnel to check, thereby achieving preventive maintenance and avoiding emission accidents or equipment damage caused by ignition failure. When it is necessary to replace the nano-ceramic crystal ignition gun 2 or other components, thanks to the quick-release structure of the flame stabilization and protection bracket 3 and the modular junction box 4 and junction box 26, partial replacement can be carried out quickly, greatly shortening maintenance downtime.

[0056] The above description is only a part of the specific embodiments of the present invention. The scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-temperature crystal ignition device for a coke oven riser pipe, characterized in that, include: An adjustable isolation transformer (1) is used to convert the input AC voltage into a 7-12V adjustable low-voltage DC or AC output; The nano-ceramic crystal ignition gun (2) has a nano-ceramic crystal heating element (21) inside, and the nano-ceramic crystal ignition gun (2) is electrically connected to the output terminal of the adjustable voltage isolation transformer; A flame-stabilizing and protective bracket (3) is used to support and fix the nano-ceramic crystal ignition gun (2), and it has an adjustable mounting structure and a windproof and flame-stabilizing cover (33). High-temperature resistant junction box (4) and high-temperature resistant control cable (5) are used to realize the electrical connection between the components in the device; The current detection unit is used to detect the operating current status of the circuit in which the nano-ceramic crystal ignition gun is located and output the corresponding detection signal.

2. The high-temperature crystal ignition device for a coke oven riser pipe according to claim 1, characterized in that, The adjustable voltage isolation transformer (1) includes an inner stainless steel shell, a middle heat insulation layer and an outer stainless steel protective shell arranged sequentially from the inside to the outside; the middle heat insulation layer is a nano aerogel felt.

3. The high-temperature crystal ignition device for a coke oven riser pipe according to claim 1, characterized in that, The nano-ceramic crystal ignition gun (2) includes a gun head (22), a gun body, and a junction box (26) connected in sequence. The nano-ceramic crystal heating element (21) is disposed inside the gun head (22), and the front end of the gun head (22) is provided with multiple vent holes (23) arranged in a ring array. The gun body is bent and includes an inner heat insulation layer (24) and a gun barrel (25) sleeved on the outside of it, with a gap between the inner heat insulation layer (24) and the gun barrel (25); The junction box (26) is located at the rear of the gun body and is used to connect the high-temperature resistant control cable (5).

4. The high-temperature crystal ignition device for a coke oven riser pipe according to claim 3, characterized in that, The nano-ceramic crystal heating element (21) is a nitride-based or oxide-based nano-ceramic crystal doped with rare earth metal oxides.

5. A high-temperature crystal ignition device for a coke oven riser pipe according to claim 3, characterized in that, The axes of the plurality of vent holes (23) are inclined relative to the axis of the gun head.

6. The high-temperature crystal ignition device for a coke oven riser pipe according to claim 3, characterized in that, The inner insulation layer (24) includes a ceramic sleeve and a ceramic fiber layer covering it; The gun barrel (25) is a stainless steel tube with a heat-resistant coating on its surface.

7. The high-temperature crystal ignition device for a coke oven riser pipe according to claim 1, characterized in that, The fire-stabilizing and protective bracket (3) includes a detachably connected upper frame (31) and a lower frame (32). The upper frame (31) is provided with the windproof and flame-stabilizing cover (33) and the mounting tube (34) for mounting the nano-ceramic crystal ignition gun. The lower frame (32) has an installation structure for connecting to the coke oven riser flange.

8. A high-temperature crystal ignition device for a coke oven riser pipe according to claim 1, characterized in that, The high-temperature resistant junction box (4) has a cast aluminum shell and ceramic terminals, and its protection level is not lower than IP66; The high-temperature resistant control cable (5) has a fluoroplastic insulation layer and a mica wrapping layer.

9. A high-temperature crystal ignition device for a coke oven riser pipe according to claim 1, characterized in that, The The current detection unit is configured as follows: When the detected loop current is 0A, it is determined to be a broken wire fault; When the circuit current is detected to be consistently below 0.5A, it is determined to be an underload fault. When the circuit current is detected to be consistently higher than 5A, it is determined to be an overload fault; It also outputs analog signals of 4-20mA and / or digital alarm signals.

10. An ignition method using the high-temperature crystal ignition device as described in any one of claims 1-9, characterized in that, Includes the following steps: 1) Adjust the output voltage of the adjustable isolation transformer to the set value to match the current gas concentration; 2) Install and fix the flame stabilizing and protective bracket (3) at the predetermined position of the coke oven riser pipe, and install the nano-ceramic crystal ignition gun (2) on the flame stabilizing and protective bracket (3) and adjust its angle; 3) Power on the nano-ceramic crystal ignition gun (2) to instantly heat its heating element to the ignition temperature, thereby igniting the raw coal gas overflowing from the riser pipe; 4) The ignition circuit current is monitored in real time through the current detection unit, and an alarm is triggered when the current is abnormal.

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