Air-water cooling combined natural gas incineration device
Through the combined design of air-water cooling, water and air are used to jointly cool high-temperature flue gas and metal walls, the problems of high fan load and high vibration noise in the existing natural gas incineration device are solved, the stability and safety of the burner are achieved, and the efficiency of particulate separation is improved.
Patent Information
- Application Number
- CN202510682062.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2025-08-19
AI Technical Summary
The existing natural gas incineration device has high fan air demand when using air cooling, resulting in strong vibration and excessive noise in the device. The water cooling technology has problems such as spray cooling and deflagration under high load and flame extinguishing under small load.
The combination design of air-water cooling is adopted, and water and air are used to jointly cool the high-temperature flue gas and metal walls. The design of the cyclone plate and nozzle achieves uniform mixing and cooling of the flue gas, and combines the adjustment mechanism and maintenance mechanism to ensure the stability and safety of the burner.
It reduces the fan load, reduces the vibration and noise of the device, improves the safety and stability of the burner, enhances the efficiency of particulate separation, and achieves uniform airflow distribution and cooling effects.
Smart Images
Figure CN120506657A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of gas incineration devices, and in particular to an air-water-cooled combined natural gas incineration device. Background Art
[0002] Fuel tankers and bunkering ships will inevitably leak gas fuel during the fuel transportation and bunkering process, causing environmental pollution. Marine gas incineration devices are used to incinerate leaked gas fuel, and the exhaust flue gas meets relevant requirements. In recent years, with the rise of liquefied natural gas carriers, natural gas incineration devices have also been widely used. Currently, most domestic and foreign manufacturers use air to cool high-temperature flue gas, but the heat absorption capacity of air is not very good, resulting in a large demand for fan air volume, which in turn leads to strong vibration of the device and excessive noise. Water is an excellent heat absorber, and water-cooled high-temperature flue gas can effectively reduce fan air volume, vibration and noise. However, the water cooling technology path has the problem of spray cooling under high load of the device causing deflagration and spray cooling under low load causing flame extinction. Therefore, there is an urgent need for an air-water-cooled combined natural gas incineration device that can both reduce the fan load and control the burner to burn stably and safely. Summary of the Invention
[0003] In response to the above technical problems, the present invention provides an air-water-cooled combined marine natural gas incineration device, which uses water and air to cool the high-temperature flue gas and metal wall surfaces, reduce the fan load, and ensure safe and stable combustion of the burner, so as to overcome the shortcomings of the existing technical path.
[0004] The technical solution adopted by the present invention is: an air-water-cooled combined natural gas incineration device, comprising an outer cylinder, a combustion chamber provided inside the outer cylinder, and a burner provided inside the combustion chamber; a swirl plate is provided inside the combustion chamber, the swirl plate is conical, and an annular tube is provided above the combustion chamber, with nozzles evenly arranged on the annular tube for cooling the flue gas and the swirl plate; the high-temperature flue gas in the center will diffuse to the periphery through the swirl plate to form a swirl, which not only ensures the uniform mixing of the flue gas, but also enhances the cooling effect in the process of mixing air and flue gas; four types of ventilation holes divided by height are opened on the wall of the combustion chamber, and part of the air enters the combustion chamber through the ventilation holes and mixes with the flue gas for cooling; a maintenance mechanism is provided on the top outside the outer cylinder for cleaning and maintaining the swirl plate; an adjustment mechanism is provided on the outside of the outer cylinder for adjusting the relative position of the swirl plate and the central flue gas.
[0005] As a preferred solution, a fan is provided at the bottom of the outer cylinder, which provides an appropriate amount of air into the combustion chamber, ensuring sufficient combustion of the flame generated by the burner and preventing the flame from contacting the wall of the combustion chamber and causing overheating of the wall.
[0006] As a preferred embodiment, the ventilation holes are arranged in a circular array on the combustion chamber. In the same vertical direction, the apertures of the four ventilation holes decrease from bottom to top. Air enters the combustion chamber from the ventilation holes of different apertures, and the air flow rate changes accordingly. An air inlet is provided at the bottom of the combustion chamber, and part of the air enters the combustion chamber from the air inlet.
[0007] As a preferred solution, a water pump is provided on the outside of the outer cylinder, which is connected to the annular pipe and is used to provide water power for the nozzles on the annular pipe. Cooling water that meets the pressure and flow requirements is provided by a single or multiple water pumps, and the water flow in the annular pipe can be adjusted by means of orifice plate flow limiting or regulating valve.
[0008] As a preferred solution, a blocking portion is provided on the outer side of the nozzle on the ring tube for blocking smoke particles and large-diameter water droplets.
[0009] As a preferred solution, the adjustment mechanism includes a motor 1, a screw 1, a guide rod 1 and a slide 1 arranged on the outside of the outer cylinder, the motor 1 is used to drive the screw 1, the slide 1 moves on the screw 1 and the guide rod 1, and the slide 1 and the screw 1 form a spiral pair, a connecting rod is provided on the slide 1, a connecting shaft is provided at one end of the connecting rod, and the bottom end of the connecting shaft is connected to the swirl plate for adjusting the position of the swirl plate.
[0010] As a preferred solution, the maintenance mechanism includes a second motor, a second screw rod, and a second guide rod arranged on the outer cylinder. The second motor is used to drive the second guide rod. A collecting plate is movably arranged on the second screw rod and the second guide rod. The collecting plate and the second screw rod form a spiral pair, and a cleaning motor is arranged on the collecting plate. A cleaning part is arranged on the output shaft of the cleaning motor for cleaning the inner conical surface of the swirl plate.
[0011] Working principle: The fan provides an appropriate amount of air into the combustion chamber, which not only ensures the full combustion of the flame generated by the burner, but also prevents the flame from contacting the wall of the combustion chamber and causing overheating of the wall. Specifically, part of the air enters the combustion chamber from the air inlet, and part of the air can also enter the combustion chamber from ventilation holes of different apertures to mix with the flue gas for cooling. The high-temperature flue gas in the center will diffuse to the periphery through the swirl plate to form a swirl, which not only ensures the uniform mixing of the flue gas, but also enhances the cooling effect during the mixing process of air and flue gas. Furthermore, the air enters from ventilation holes of different apertures, and its flow rate changes, which can improve the mixing effect of air and flue gas.
[0012] The water pump provides water power to the nozzle on the ring pipe, and the nozzle sprays water mist to cool the flue gas and the swirl plate; the blocking part can block large-sized water droplets and can block smoke particles outside the nozzle, which is beneficial for protection.
[0013] Furthermore, the height position of the swirl plate can be adjusted by operating the motor, rotating the screw, and moving the slide. By changing the distance between the swirl plate and the airflow, the speed and flow pattern of the airflow can be adjusted. This dynamic adjustment helps to improve the separation efficiency of particulate matter. When close to the airflow, the swirl plate can enhance the rotation effect of the airflow, thereby more effectively separating solid particles; the constant movement of the swirl plate can reduce the accumulation of sediment. The flow pattern and sedimentation behavior of the particulate matter will be different when the swirl plate is in different positions and states, thereby reducing the adhesion of solid particles to the swirl plate; constantly changing the position of the swirl plate can improve the distribution of the airflow in the system, thereby ensuring that the airflow contacts the swirl plate evenly, thereby improving the flow efficiency.
[0014] Subsequently, the inner conical surface of the swirl plate can be maintained and cleaned. Specifically, the swirl plate is transferred to the top of the outer cylinder, the second motor is operated, the second screw rotates, and the collection plate is moved to the bottom of the swirl plate. The cleaning motor drives the cleaning part to clean the inner conical surface of the swirl plate, and impurities fall into the collection plate for collection.
[0015] Compared with the prior art, the present invention has the following advantages: (1) part of the air enters the combustion chamber from the air inlet, and part of the air can also enter the combustion chamber from ventilation holes of different apertures to mix with the flue gas for cooling. The high-temperature flue gas in the center will diffuse to the periphery through the swirl plate to form a swirl, which not only ensures the uniform mixing of the flue gas, but also enhances the cooling effect during the mixing process of air and flue gas; (2) the air enters from ventilation holes of different apertures, and its flow rate changes, which can improve the mixing effect of air and flue gas; (3) the nozzle sprays water mist to cool the flue gas and the swirl plate; the blocking part can block large-sized water droplets and can block smoke particles outside the nozzle, which is beneficial for protection; (4) the height position of the swirl plate can adjust the speed and flow pattern of the air flow by changing the distance between the swirl plate and the air flow. This dynamic adjustment helps to improve the separation efficiency of particulate matter. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0017] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.
[0018] Figure 3 This is a schematic diagram of the combustion chamber installation structure of the present invention.
[0019] Figure 4 This is a schematic diagram of the internal installation structure of the combustion chamber of the present invention.
[0020] Figure 5 Schematic diagram of the ring tube structure of the present invention.
[0021] Figure markings: 1-outer cylinder; 2-fan; 3-motor 1; 4-screw 1; 5-guide rod 1; 6-slide 1; 7-connecting rod; 701-connecting shaft; 8-motor 2; 9-screw 2; 10-guide rod 2; 11-collecting tray; 12-cleaning motor; 13-cleaning part; 14-burner; 15-combustion chamber; 16-ventilation hole; 17-air inlet hole; 18-swirl plate; 19-water pump; 20-annular pipe; 21-blocking part. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.
[0023] Example: Figures 1 to 5 As shown, an air-water-cooled combined natural gas incineration device includes an outer cylinder 1, a combustion chamber 15 is arranged inside the outer cylinder 1, and a burner 14 is arranged inside the combustion chamber 15; a swirl plate 18 is arranged inside the combustion chamber 15, and the swirl plate 18 is conical. An annular pipe 20 is arranged above the combustion chamber 15, and nozzles are evenly arranged on the annular pipe 20 for cooling the flue gas and the swirl plate 18; the high-temperature flue gas in the center will diffuse to the periphery through the swirl plate to form a swirl, which not only ensures the uniform mixing of the flue gas, but also enhances the cooling effect in the process of mixing air and flue gas; four types of ventilation holes 16 divided by height are opened on the wall of the combustion chamber 15, and a part of the air enters the combustion chamber 15 through the ventilation holes 16 and mixes with the flue gas for cooling; a maintenance mechanism is provided on the top outside of the outer cylinder 1 for cleaning and maintaining the swirl plate 18; an adjustment mechanism is provided on the outside of the outer cylinder 1 for adjusting the relative position of the swirl plate 18 and the central flue gas.
[0024] A fan 2 is provided at the bottom of the outer cylinder 1, which provides an appropriate amount of air to the combustion chamber 15, ensuring sufficient combustion of the flame generated by the burner 14 and preventing the flame from contacting the wall of the combustion chamber 15 and causing the wall to overheat.
[0025] The ventilation holes 16 are arranged in a circular array on the combustion chamber 15. In the same vertical direction, the apertures of the four ventilation holes 16 decrease from bottom to top. Air enters the combustion chamber 15 from the ventilation holes 16 of different apertures, and the air flow rate changes accordingly; an air inlet hole 17 is provided at the bottom of the combustion chamber 15, and part of the air enters the combustion chamber 15 from the air inlet hole 17.
[0026] A water pump 19 is provided on the outside of the outer cylinder 1, and the water pump 19 is connected to the ring pipe 20, and is used to provide water power for the nozzle on the ring pipe 20. Cooling water that meets the pressure and flow requirements is provided by a single or multiple water pumps 19, and the water flow of the ring pipe 20 can be adjusted by means of orifice plate flow limiting or regulating valve; a blocking part 21 is provided on the outside of the nozzle on the ring pipe 20, which is used to block smoke particles and large-sized water droplets.
[0027] The adjustment mechanism includes a motor 3, a screw rod 4, a guide rod 5 and a slide 6 arranged on the outside of the outer cylinder 1. The motor 3 is used to drive the screw rod 4. The slide 6 moves on the screw rod 4 and the guide rod 5, and the slide 6 and the screw rod 4 form a spiral pair. A connecting rod 7 is provided on the slide 6. A connecting shaft 701 is provided at one end of the connecting rod 7. The bottom end of the connecting shaft 701 is connected to the swirl plate 18 for adjusting the position of the swirl plate 18.
[0028] The maintenance mechanism includes a motor 28, a screw 29, and a guide rod 210 arranged on the outer cylinder 1. The motor 28 is used to drive the guide rod 210. A collecting plate 11 is movably arranged on the screw 29 and the guide rod 210. The collecting plate 11 and the screw 29 form a spiral pair, and a cleaning motor 12 is provided on the collecting plate 11. A cleaning part 13 is provided on the output shaft of the cleaning motor 12, which is used to clean the inner conical surface of the swirl plate 18.
[0029] Working principle: The fan 2 provides an appropriate amount of air to the combustion chamber 15, which not only ensures the full combustion of the flame generated by the burner 14, but also prevents the flame from contacting the wall of the combustion chamber 15 and causing the wall to overheat. Specifically, part of the air enters the combustion chamber 15 from the air inlet 17, and part of the air can also enter the combustion chamber 15 from the ventilation holes 16 with different apertures to mix with the flue gas for cooling. The high-temperature flue gas in the center will diffuse to the periphery through the swirl plate 18 to form a swirl, which not only ensures the uniform mixing of the flue gas, but also enhances the cooling effect during the mixing process of air and flue gas. Furthermore, the air enters from the ventilation holes 16 with different apertures, and its flow rate changes, which can improve the mixing effect of air and flue gas.
[0030] The water pump 19 provides water power to the nozzle on the ring pipe 20, and the nozzle sprays water mist to cool the flue gas and the swirl plate 18; the blocking part 21 can block large-sized water droplets and can block smoke particles outside the nozzle, which is beneficial for protection.
[0031] Furthermore, the height position of the swirl plate 18 can be adjusted by operating the motor 3, rotating the screw 4, and moving the slide 6. By changing the distance between the swirl plate 18 and the airflow, the speed and flow pattern of the airflow can be adjusted. This dynamic adjustment helps to improve the separation efficiency of particulate matter. When close to the airflow, the swirl plate 18 can enhance the rotation effect of the airflow, thereby more effectively separating solid particles; the swirl plate 18 moves continuously to reduce the accumulation of sediment. When the swirl plate 18 is in different positions and states, the flow pattern and sedimentation behavior of the particulate matter will be different, thereby reducing the adhesion of solid particles to the swirl plate; constantly changing the position of the swirl plate 18 can improve the distribution of the airflow in the system, thereby ensuring that the airflow contacts the swirl plate 18 evenly, thereby improving the flow efficiency.
[0032] Subsequently, the inner conical surface of the swirl plate 18 can be maintained and cleaned. Specifically, the swirl plate 18 is transferred to the top of the outer cylinder 1, the motor 2 8 is operated, the screw 2 9 rotates, and the collecting plate 11 is moved to the bottom of the swirl plate 18. The cleaning motor 12 drives the cleaning part 13 to clean the inner conical surface of the swirl plate 18, and impurities fall into the collecting plate 11 for collection.
[0033] The above is a detailed introduction to the solutions provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.
Claims
1. An air-water-cooled combined natural gas incineration device, comprising an outer cylinder (1), a combustion chamber (15) disposed inside the outer cylinder (1), and a burner (14) disposed inside the combustion chamber (15); characterized in that: A swirl plate (18) is provided inside the combustion chamber (15), and the swirl plate (18) is conical. An annular tube (20) is provided above the combustion chamber (15), and nozzles are evenly arranged on the annular tube (20) for cooling the flue gas and the swirl plate (18); the high-temperature flue gas in the center diffuses toward the periphery through the swirl plate (18) to form a swirl, which not only ensures the uniform mixing of the flue gas, but also enhances the cooling effect during the mixing process of air and flue gas; four types of ventilation holes (16) divided by height are opened on the wall of the combustion chamber (15), and a part of the air enters the combustion chamber (15) through the ventilation holes (16) and mixes with the flue gas for cooling; a maintenance mechanism is provided on the top of the outer side of the outer cylinder (1) for cleaning and maintaining the swirl plate (18); and an adjustment mechanism is provided on the outer side of the outer cylinder (1) for adjusting the relative position of the swirl plate (18) and the central flue gas.
2. The air-water-cooled combined natural gas incineration device according to claim 1, characterized in that: A fan (2) is provided at the bottom of the outer cylinder (1), and the fan (2) provides an appropriate amount of air into the combustion chamber (15), thereby ensuring that the flame generated by the burner (14) is fully burned and preventing the flame from contacting the wall of the combustion chamber (15) and causing the wall to overheat.
3. The air-water-cooled combined natural gas incineration device according to claim 1, characterized in that: The ventilation holes (16) are arranged in a circular array on the combustion chamber (15). In the same vertical direction, the apertures of the four ventilation holes (16) decrease from bottom to top. Air enters the combustion chamber (15) from the ventilation holes (16) with different apertures, and the air flow rate changes accordingly. An air inlet hole (17) is provided at the bottom end of the combustion chamber (15), and part of the air enters the combustion chamber (15) from the air inlet hole (17).
4. The air-water-cooled combined natural gas incineration device according to claim 1, characterized in that: A water pump (19) is provided outside the outer cylinder (1), and the water pump (19) is connected to the annular pipe (20) and is used to provide water power for the nozzles on the annular pipe (20). Cooling water that meets the pressure and flow requirements is provided by a single or multiple water pumps (19), and the water flow of the annular pipe (20) can be adjusted by means of orifice plate flow limiting or regulating valve.
5. The air-water-cooled combined natural gas incineration device according to claim 4, characterized in that: A blocking portion (21) is provided on the outer side of the nozzle on the ring tube (20) for blocking smoke particles and large-diameter water droplets.
6. The air-water-cooled combined natural gas incineration device according to claim 1, characterized in that: The regulating mechanism comprises a motor (3), a screw (4), a guide rod (5) and a slide (6) arranged outside the outer cylinder (1), wherein the motor (3) is used to drive the screw (4), the slide (6) moves on the screw (4) and the guide rod (5), and the slide (6) and the screw (4) form a spiral pair, and a connecting rod (7) is provided on the slide (6), and a connecting shaft (701) is provided at one end of the connecting rod (7), and the bottom end of the connecting shaft (701) is connected to the swirl plate (18) for adjusting the position of the swirl plate (18).
7. The air-water-cooled combined natural gas incineration device according to claim 1, characterized in that: The maintenance mechanism comprises a second motor (8), a second screw rod (9), and a second guide rod (10) arranged on the outer cylinder (1). The second motor (8) is used to drive the second guide rod (10). A collecting plate (11) is movably arranged on the second screw rod (9) and the second guide rod (10). The collecting plate (11) and the second screw rod (9) form a spiral pair. A cleaning motor (12) is arranged on the collecting plate (11). A cleaning part (13) is arranged on the output shaft of the cleaning motor (12) for cleaning the inner conical surface of the swirl plate (18).