A positive and reverse cyclone coke oven gas combustion device

Abstract

The utility model discloses a kind of positive and negative cyclone coke oven gas combustion devices, including the top spare compressed air pipeline, the coke oven gas tee joint of being sleeved in spare compressed air pipeline outer layer, the air pipe of being sleeved in coke oven gas tee joint outer layer, the refractory cement base of being sleeved in air pipe outer layer;Refractory cement base side sets ignition burner, ignition burner opposite side sets igniter, the air pipe inside and the outside between gas pipeline are set positive cyclone device, the coke oven gas tee joint inside and between spare compressed air pipeline are set negative cyclone device.The utility model discloses a kind of positive and negative cyclone coke oven gas combustion devices can realize the probability of automatic successful ignition, burner service life is long and improve combustion temperature.

Description

Technical Field

[0001] This utility model relates to the field of baking equipment, specifically a positive and negative swirling coke oven gas burner device. Background Technology

[0002] In the northern region, coal resources are relatively abundant, and the corresponding metallurgical enterprises include coking plants. The coke oven gas produced can be used for baking in the intermediate ladle unit of the steelmaking process. The main combustible components of coke oven gas include CO, H2, and CH4, and the calorific value of coke oven gas is relatively higher than that of ordinary blast furnace gas / converter gas, generally greater than 4000 kcal.

[0003] Based on the air-fuel ratio for gas combustion, the amount of air in the mixture needs to be greater than that of ordinary blast furnace gas / converter gas. Whether the air and gas are mixed sufficiently is related to the combustion efficiency. In actual applications, incomplete combustion often occurs, resulting in energy waste, low baking efficiency, and short service life of the intermediate burner. In addition, the lack of a stable automatic ignition device and reliance on manual ignition poses potential safety risks.

[0004] In summary, existing technologies suffer from problems such as uneven air-fuel mixing, short equipment lifespan, significant energy waste, low combustion efficiency, and high safety risks. Utility Model Content

[0005] This utility model provides a forward and reverse swirl coke oven gas combustion device to solve problems such as insufficient mixing and combustion of coke oven gas, resulting in energy waste, low baking efficiency, and short service life of the intermediate burner. It also provides a stable and reliable automatic ignition device to improve the safety of on-site metallurgical equipment use.

[0006] To achieve the above objectives, the present invention adopts the following solution:

[0007] A forward and reverse swirl coke oven gas combustion device includes a top-mounted spare compressed air pipe, a coke oven gas tee sleeved on the outside of the spare compressed air pipe, an air pipe sleeved on the outside of the coke oven gas tee, and a refractory cement base sleeved on the outside of the air pipe; an ignition burner is installed on the side of the refractory cement base, and an igniter is installed on the opposite side of the ignition burner; a forward swirl device is installed between the inside of the air pipe and the outside of the gas pipe, and a reverse swirl device is installed between the inside of the coke oven gas tee and the spare compressed air pipe.

[0008] This utility model also provides the following optimization solution:

[0009] Furthermore, a diversion hole is provided at the end of the spare compressed air pipeline at the top.

[0010] Furthermore, the backup compressed air pipeline is outerly fitted with a coke oven gas tee, and a reverse vortex device is installed at the bottom of the coke oven gas tee. The distance between the reverse vortex device and the bottom of the coke oven gas tee is ≤20mm.

[0011] Furthermore, the coke oven gas tee is outerly fitted with an air pipe, and a positive swirl device is installed ≤25mm from the bottom of the coke oven gas tee.

[0012] Furthermore, the air duct is covered with a fire-resistant cement base, has a fastening flange on top, an ignition burner on one side, and an igniter on the other side.

[0013] Furthermore, the forward cyclone device and the reverse cyclone device have a cyclone angle ≥30° and a groove width ≥16mm.

[0014] Furthermore, the outer side of the refractory cement castable is reinforced with stiffening plates, while the inner side is made of refractory cement castable.

[0015] Furthermore, the bottom of the ignition burner is provided with an igniter, the upper side is provided with an ignition compressed air inlet, and the lower side is provided with an ignition burner gas inlet.

[0016] Furthermore, the ignition burner and igniter mentioned above have an igniter tilt angle ≥75° and an ignition burner tilt angle ≤45°.

[0017] Furthermore, the coke oven gas tee and the end section of the air pipeline are equipped with loose flanges.

[0018] The positive and negative swirl coke oven gas combustion device of this utility model has the following effects:

[0019] The positive and negative swirl coke oven gas combustion device of this utility model can enhance the mixing effect of air and gas, improve the combustion effect, improve the thermal efficiency, and provide a backup compressed air device to temporarily supplement the air volume.

[0020] The present invention relates to a positive and negative swirl coke oven gas combustion device, which adds an ignition burner and an igniter to improve the success rate of automatic ignition and enhance the safety of equipment use.

[0021] The refractory cement casting base of the positive and negative swirl coke oven gas combustion device of this utility model, with high-temperature resistant cement in the inner cavity, improves the service life of the combustion chamber of the combustion device and saves the enterprise equipment procurement cost during use. Attached Figure Description

[0022] Figure 1 This is an isometric view of the forward and reverse swirl coke oven gas combustion device of this utility model;

[0023] Figure 2 This is a front view of the forward and reverse swirl coke oven gas combustion device of this utility model;

[0024] Figure 3 This is a cross-sectional view of the forward and reverse swirl coke oven gas combustion device of this utility model;

[0025] Figure 4 This is an isometric view of the forward swirl device of the forward and reverse swirl coke oven gas combustion device of this utility model;

[0026] Figure 5 This is an isometric view of the reverse swirl device of the forward and reverse swirl coke oven gas combustion device of this utility model;

[0027] The specific reference numerals are as follows:

[0028] 1. Spare compressed air pipeline; 2. Coke oven gas tee; 3. Air pipeline; 4. Ignition device; 5. Refractory cement base; 6. Ignition burner; 7. Ignition burner compressed air inlet; 8. Ignition burner gas inlet; 9. Fastening flange; 10. Forward cyclone device; 11. Reverse cyclone device; 12. Refractory cement castable; 13. Reinforcing rib plate; 14. Diversion hole. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0030] like Figure 1-5 As shown, this utility model discloses a forward and reverse swirl coke oven gas combustion device, including a top-mounted spare compressed air pipe 1, a coke oven gas tee 2 sleeved on the spare compressed air pipe, an air pipe 3 sleeved on the coke oven gas tee, and a refractory cement base 5 sleeved on the air pipe. An ignition burner 6 is installed on one side of the refractory cement base, and an igniter 4 is installed on the other symmetrical side. A forward swirl device 10 is installed inside the air pipe, and a reverse swirl device 11 is installed inside the coke oven gas tee. This forward and reverse swirl coke oven gas combustion device can achieve a higher probability of automatic successful ignition, longer burner life, and increased combustion temperature. The forward swirl device 10 is through which air flows, generating a forward rotating airflow; the reverse swirl device 11 is through which gas flows, generating a reverse rotating airflow. The middle area is the spare compressed air pipe 1, and the bottom ejects a parallel airflow. Furthermore, the forward and reverse swirling devices are manufactured and installed in opposite directions. The swirling vanes are made of 310s stainless steel, and parallel airflow is ejected from the bottom, achieving a triple premixing effect.

[0031] The spare compressed air pipe 1 is cylindrical, with its length determined by the overall design of the combustion device. Its inner surface is precision-polished to ensure a smooth airflow transition and reduce friction loss. One end of the pipe connects to compressed air, while the other end is open and connects to the ignition burner compressed air inlet 7 using a quick-connect connector for easy installation and disassembly. It is installed at the top center of the combustion device as the innermost component. It connects to the ignition burner compressed air inlet 7 via a dedicated interface or flange, ensuring sealing and durability, and uses O-rings to prevent gas leakage.

[0032] The coke oven gas tee 2 adopts a T-type tee structure, with the main body made of high-strength stainless steel, possessing excellent corrosion resistance and resistance to thermal deformation. An internal guide plate is installed to optimize the gas flow direction, ensuring uniform gas distribution and passage through the reverse swirl device 11. It is fitted onto the outside of the spare compressed air pipeline 1, and a stable connection between the two is ensured by welding or other high-strength fixing methods. An appropriate gap is maintained between it and the air pipeline 3 to allow airflow and avoid interference.

[0033] The fastening flange 9 is a circular flange with multiple evenly distributed bolt holes for fastening connections. The surface of the fastening flange 9 is galvanized to increase friction, prevent loosening, and ensure corrosion resistance at the connection. It is installed at both ends of the air duct 3 and is tightly connected to the refractory cement base 5 and other components using bolts and nuts, ensuring a tight seal and mechanical strength at the connection.

[0034] The diversion holes 14 are circular or elliptical holes, distributed at appropriate locations on the air pipe 3 and the coke oven gas tee 2. The number is designed according to specific operating conditions to ensure uniform airflow distribution. The edges of the holes are chamfered to reduce airflow impact and ensure uniform airflow distribution. As an auxiliary channel, the diversion holes 14 help adjust the airflow speed and direction, optimize the combustion process, ensure sufficient mixing of gas and air, and improve combustion efficiency.

[0035] like Figure 2 As shown, the outer end of the air pipe 3 is fitted with a fastening flange 9, which is secured with bolts (bolt mechanical performance grade 8.8) and nuts. This is mainly for the combined connection between the air pipe and the refractory cement base 5. Its primary function is to connect the air pipe and the refractory cement base, and also to enhance strength. The air pipe 3 is an annular sleeve structure, surrounding the coke oven gas tee 2 to form a complete closed space. The inner wall is smooth, facilitating smooth airflow into the forward swirl device 10. The pipe wall thickness is moderate, capable of withstanding working pressure without affecting the overall weight, and is made of high-temperature resistant alloy steel. The air pipe 3 tightly wraps around the coke oven gas tee 2, but does not directly contact it, leaving a small gap for air circulation. Both ends are connected to other components via loose flanges, facilitating disassembly and maintenance and ensuring the sealing of the connections.

[0036] like Figure 3 As shown, there are a forward swirling device 10 and a reverse swirling device 11. Both the forward and reverse swirling devices have a swirling angle ≥30° and a groove width ≥16mm. The forward swirling device 10 is a helical blade type with a blade angle ≥30° and a groove width ≥16mm. It is made of stainless steel, possessing good corrosion resistance and resistance to thermal deformation. The helix angle is 45-75°, ensuring a strong forward swirling airflow when air passes through. The main body of the device is a cylindrical shell with a smooth inner wall to reduce airflow resistance. The forward swirling device 10 is installed inside the air duct 3, receiving the airflow from the air duct 3, and is secured by welding or bolts to ensure a firm installation.

[0037] The reverse vortex device 11 is a helical blade type with a blade angle ≥30° and a groove width ≥16mm. It is made of stainless steel, possessing excellent corrosion resistance and resistance to thermal deformation. The helix angle is 45-75°, ensuring a strong reverse swirling airflow when the gas flows through. The main body of the device is a cylindrical shell with a smooth inner wall to reduce airflow resistance. The reverse vortex device 11 is installed inside the coke oven gas tee 2, receiving the gas flow from the coke oven gas tee 2, and is securely fixed by welding or bolts.

[0038] like Figure 1As shown, the refractory cement base 5 has reinforcing ribs 13 on its sides and refractory cement castable 12 inside. The reinforcing ribs mainly improve the overall strength of the burner and prevent it from cracking under high-temperature combustion conditions. The refractory cement mainly improves the overall service life of the burner. The refractory cement base 5 is disc-shaped with a central opening to accommodate the air pipe 3 and multiple bolt holes around it for installing other components. The refractory cement base 5 is made of high-strength refractory material (such as high-alumina refractory bricks), which can resist high-temperature erosion and protect the internal equipment from damage. The interior is filled with refractory cement castable 12 to enhance structural stability. Located on the outermost layer of the entire combustion device, it provides support and protection. It is firmly connected to the air pipe 3 by fastening the flange 9, while the reinforcing ribs 13 improve the overall rigidity. The refractory cement castable 12 is an unshaped refractory material, which is cast on-site according to the specific shape of the refractory cement base 5, forming a solid integral structure after curing. The material selected is high-alumina refractory cement, which has excellent thermal insulation properties and mechanical strength, effectively protecting the internal equipment from high temperatures. It is cast inside the refractory cement base 5, completely filling the gaps, enhancing the integrity and durability of the base, and ensuring long-term stable operation in high-temperature environments. Multiple reinforcing ribs 13 can be installed as needed, distributed on the sides of the refractory cement base 5. The reinforcing ribs 13 are made of high-strength alloy steel, possessing good high-temperature resistance and mechanical strength. They are fixed to the refractory cement base 5 by welding or bolting, significantly improving the overall strength of the burner, especially preventing cracking under high-temperature environments, and ensuring the structural stability of the combustion device.

[0039] like Figure 1 As shown, the bottom of the ignition burner 6 is equipped with an igniter 4, the upper side is the ignition burner compressed air inlet 7, and the lower side is equipped with an ignition burner gas inlet 8; the gas supply sequence of the ignition burner cannot be reversed.

[0040] like Figure 1 As shown, the ignition burner 6 and igniter 4 are positioned with an angle ≥75° and an angle ≤45°. Determining these angle parameters increases the probability of successful ignition for both the burner 6 and igniter 4. The igniter 4 is a slender rod with an ignition electrode at the front and a power cord at the rear. The electrode is made of a high-temperature resistant material (such as alumina ceramic), capable of withstanding instantaneous high temperatures without damage. The overall length and angle (≥75°) are precisely calculated to ensure accurate ignition of the gas mixture within the burner 6. The igniter 4 is fixedly mounted on one side of the refractory cement base 5, opposite the burner 6, and supported by an insulating bracket to prevent current leakage.

[0041] The ignition burner 6 is a conical nozzle with a slightly upward-sloping tip (≤45°) to facilitate flame guidance. It features a complex internal premixing chamber to ensure thorough mixing of gas and air. A fine-tuning valve at the nozzle outlet allows for flame size adjustment from 0-100% to meet specific needs. It is installed on the opposite side of the refractory cement base 5, diagonally opposite the igniter 4. The ignition burner's compressed air inlet 7 and gas inlet 8 are connected to the spare compressed air pipeline 1 and coke oven gas tee 2, respectively, ensuring correct gas supply sequence. The inlets use quick-connect connectors for easy installation and removal.

[0042] The compressed air inlet 7 of the ignition burner is a short tubular interface with a built-in filter to prevent impurities from entering and affecting the ignition effect. The interface uses a threaded connection to ensure sealing, and a metal sealing gasket is used to prevent gas leakage. The compressed air inlet 7 of the ignition burner is directly connected to the end of the spare compressed air pipeline 1 to ensure that compressed air can be directly delivered to the inside of the ignition burner 6.

[0043] The ignition burner gas inlet 8, similar to the ignition burner compressed air inlet 7, is also equipped with a filter to ensure gas quality. The interface uses a threaded connection to ensure sealing, and a metal sealing gasket prevents gas leakage. It connects to one branch port of the coke oven gas tee 2, introducing gas into the ignition burner 6.

[0044] like Figure 1 As shown, the coke oven gas tee 2 and the air pipeline 3 are equipped with loose flanges at the end; their main purpose is to facilitate the replacement of combustion devices and components.

[0045] Through the above design optimizations, the positive and negative swirl coke oven gas combustion device provided by this utility model not only improves the mixing effect but also significantly enhances operational safety, extends equipment service life, and reduces maintenance costs. The rational combination and precise design of each component enable the entire system to operate stably under harsh conditions such as high temperature and high pressure, meeting the stringent requirements of industrial production.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A forward and reverse swirl coke oven gas combustion device, characterized in that, It includes a top-mounted spare compressed air pipeline, a coke oven gas tee sleeved on the outside of the spare compressed air pipeline, an air pipeline sleeved on the outside of the coke oven gas tee, and a refractory cement base sleeved on the outside of the air pipeline; an ignition burner is installed on the side of the refractory cement base, and an igniter is installed on the opposite side of the ignition burner; a forward swirl device is installed between the inside of the air pipeline and the outside of the gas pipeline, and a reverse swirl device is installed between the inside of the coke oven gas tee and the spare compressed air pipeline.

2. The forward and reverse swirl coke oven gas combustion device according to claim 1, characterized in that, A diversion hole is provided at the end of the backup compressed air pipeline.

3. The forward and reverse swirl coke oven gas combustion device according to claim 1, characterized in that, The bottom of the coke oven gas tee is equipped with a reverse vortex device, and the distance between the reverse vortex device and the bottom of the coke oven gas tee is ≤20mm.

4. The forward and reverse swirl coke oven gas combustion device according to claim 1, characterized in that, The coke oven gas tee is covered by an air pipe on the outside, and a positive swirl device is installed ≤25mm from the bottom of the coke oven gas tee.

5. The forward and reverse swirl coke oven gas combustion device according to claim 1, characterized in that, The air duct is covered by a fire-resistant cement base and has a fastening flange on top.

6. The forward and reverse swirl coke oven gas combustion device according to claim 4, characterized in that, The forward cyclone device and the reverse cyclone device have a cyclone angle ≥30° and a groove width ≥16mm.

7. The forward and reverse swirl coke oven gas combustion device according to claim 5, characterized in that, The refractory cement base is reinforced with ribs on the outside and filled with refractory cement castable inside.

8. The forward and reverse swirl coke oven gas combustion device according to claim 5, characterized in that, The ignition burner has an igniter at the bottom, an ignition compressed air inlet at the upper side, and a gas inlet at the lower side.

9. The forward and reverse swirl coke oven gas combustion device according to claim 5, characterized in that, The igniter position tilt angle is ≥75°, and the ignition burner position angle is ≤45°.

10. The forward and reverse swirl coke oven gas combustion device according to any one of claims 1-9, characterized in that, The coke oven gas tee and the end of the air pipeline are equipped with loose flanges.

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