Automatic ignition device for main combustion of sulfur recovery device

Abstract

The utility model relates to the technical field of sulfur recovery devices, in particular to an automatic ignition device for main combustion of a sulfur recovery device, which comprises a combustion furnace and a combustor fixed at the end of the combustion furnace, a pneumatic ignition gun is fixedly mounted on the outer wall of the combustor, and the air inlet end of the pneumatic ignition gun is connected with a factory air inlet pipe. An air pipeline is fixedly installed on the outer wall of the combustor, the air pipeline and the outer wall of the factory air inlet pipe are jointly connected with a connecting sleeve, a first filter screen is arranged on the inner wall of the connecting sleeve, a plurality of connecting rods are fixedly installed on the inner wall of the first filter screen, the ends of the connecting rods are fixedly connected with a second filter screen, and an air inlet cavity is formed between the first filter screen and the second filter screen. The second filter screen is of a conical structure, and the tip of the second filter screen faces the air inlet of the connecting sleeve. By adopting the mode that the double filter screens are used for filtering in sequence, the service life of the filter screens can be prolonged, the blocking risk is reduced, and meanwhile the gas flowing resistance can be reduced through the arrangement of the gas inlet cavity.

Description

Technical Field

[0001] This utility model relates to the technical field of sulfur recovery devices, and more specifically, to an automatic ignition device for the main combustion of a sulfur recovery device. Background Technology

[0002] The automatic ignition device for the main combustion furnace in a sulfur recovery unit is a key piece of equipment used to safely and reliably ignite fuel gas. Its main function is to achieve automatic ignition of the burner and ensure the operation of the sulfur recovery process.

[0003] Existing sulfur recovery devices generally use a single-layer planar filter structure in the gas filtration stage of the combustion system. However, this single-layer planar filter structure has certain shortcomings in filtering gas. When dust-laden gas flows through the filter, particles tend to accumulate on the filter surface, resulting in a reduction in the gas flow cross-sectional area and a significant increase in flow resistance, leading to burner ignition failure. Utility Model Content

[0004] Based on the aforementioned technical problem that "when dust-laden gas flows through the filter screen, particulate matter easily accumulates on the filter screen surface, resulting in a reduction in the gas flow cross-sectional area, a significant increase in flow resistance, and burner ignition failure," this utility model proposes an automatic ignition device for the main combustion of a sulfur recovery unit. By adopting a dual-filter system that filters sequentially, the life of the filter screen can be extended, the risk of clogging can be reduced, and the air inlet chamber can reduce the resistance to gas flow.

[0005] This utility model proposes an automatic ignition device for the main combustion of a sulfur recovery unit, including a combustion furnace;

[0006] A burner is fixed to the end of the combustion furnace. A pneumatic ignition gun is fixedly installed on the outer wall of the burner. The air inlet of the pneumatic ignition gun is connected to the factory air inlet pipe.

[0007] An air duct is fixedly installed on the outer wall of the burner;

[0008] The air duct and the outer wall of the factory air inlet duct are connected by a connecting sleeve;

[0009] The inner wall of the connecting sleeve is provided with a first filter screen, and multiple connecting rods are fixedly installed on the inner wall of the first filter screen. The ends of the connecting rods are fixedly connected to a second filter screen, and an air inlet chamber is formed between the first filter screen and the second filter screen. The second filter screen has a conical structure, and its tip faces the air inlet of the connecting sleeve. The first filter screen includes an air guide part, a filter part, and a connecting part that are connected to each other. The filter part has a conical structure, and the air guide part, filter part, and connecting part are integrally formed structures.

[0010] Preferably, the connecting part is an annular structure adapted to the inner wall of the connecting sleeve.

[0011] Preferably, the air guide is a hollow cylindrical structure with a spiral guide groove, and the end of the air guide is fixedly connected to the exhaust port of the connecting sleeve.

[0012] Preferably, a second valve is fixedly connected to the outer wall of the air duct, and a fifth valve is provided on the outer wall of the factory air inlet pipe.

[0013] Preferably, an acid gas pipeline and an oxygen pipeline are fixedly connected to the outer wall of the burner, and a first valve is provided on the outer wall of both pipelines.

[0014] Preferably, the burner is also connected to fuel gas pipe one and fuel gas pipe two respectively, and a third valve is fixedly connected to the outer wall of fuel gas pipe one, and fuel gas pipe two.

[0015] Preferably, the number of connecting rods is at least two, which are evenly distributed along the circumference between the first filter screen and the second filter screen.

[0016] Preferably, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve are all pneumatic control valves.

[0017] The beneficial effects of this utility model, achieved through the above technical solution, are as follows:

[0018] 1. Gas first enters through the conical tip of the second filter. Its conical structure gradually expands the airflow cross-section and reduces the flow velocity. Larger particles are intercepted by the second filter due to inertia, achieving preliminary filtration and reducing the burden on subsequent filters. After passing through the second filter, the gas enters the intake chamber and then passes through the conical filtration section of the first filter. The tapered structure of the filtration section concentrates the airflow, accelerating its passage through the filter's micropores and improving the capture efficiency of small particles. At the same time, it avoids excessively high local flow velocities that could cause particles to become embedded in the filter. By adopting a dual-filter system that filters sequentially, the filter life can be extended and the risk of clogging can be reduced. In addition, the design of the intake chamber can reduce the resistance to gas flow.

[0019] 2. Before igniting the main burner flame, first check the initial status of each valve. After meeting the conditions, perform furnace purging and start igniting the pneumatic ignition gun. Before igniting the pneumatic ignition gun, open the third valve, and fuel enters the pneumatic ignition gun through fuel gas pipe one and fuel gas pipe two. Open the fifth valve, and air is injected into the pneumatic ignition gun through the factory air inlet pipe. Open the second valve, and air enters the burner through the air pipe. The pneumatic ignition gun ignites, and fuel enters the burner through fuel gas pipe one, igniting the burner with the pneumatic ignition gun. This device uses a method of first igniting the pneumatic ignition gun with a small amount of gas, and then using the pneumatic ignition gun flame to ignite the main burner, which can effectively improve the ignition success rate and avoid the risk of fuel gas accumulation and flash explosion when igniting the main burner. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the installation structure of the second filter screen of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal installation structure of the connecting sleeve of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the first filter screen of this utility model.

[0024] In the diagram: 1. Combustion furnace; 2. Burner; 3. Acid gas pipeline; 4. Oxygen pipeline; 5. First valve; 6. Air pipeline; 7. Second valve; 8. Fuel gas pipeline one; 9. Third valve; 10. Fuel gas pipeline two; 11. Fourth valve; 12. Pneumatic ignition gun; 13. Factory air inlet pipe; 14. Fifth valve; 15. Connecting sleeve; 16. First filter screen; 161. Air guide section; 162. Filter section; 163. Connecting section; 17. Second filter screen; 18. Air inlet chamber; 19. Connecting rod. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] like Figures 1-4 As shown, an automatic ignition device for the main combustion of a sulfur recovery unit includes a combustion furnace 1;

[0027] The combustion furnace 1 is fixed to the burner 2 at the end of the combustion furnace. A pneumatic ignition gun 12 is fixedly installed on the outer wall of the burner 2. The air inlet end of the pneumatic ignition gun 12 is connected to the factory air inlet pipe 13.

[0028] An air duct 6 is fixedly installed on the outer wall of the burner 2;

[0029] The air duct 6 and the factory air inlet duct 13 are connected together by a connecting sleeve 15 on their outer walls;

[0030] The inner wall of the connecting sleeve 15 is provided with a first filter screen 16. Multiple connecting rods 19 are fixedly installed on the inner wall of the first filter screen 16. The ends of the connecting rods 19 are fixedly connected to the second filter screen 17. An air inlet chamber 18 is formed between the first filter screen 16 and the second filter screen 17. The second filter screen 17 has a conical structure, and its tip faces the air inlet of the connecting sleeve 15. The first filter screen 16 includes an air guide part 161, a filter part 162 and a connecting part 163 that are connected to each other. The filter part 162 has a conical structure. The air guide part 161, the filter part 162 and the connecting part 163 are integrally formed structures.

[0031] The tip of the second filter 17 faces the air inlet. When the gas enters, it diffuses and flows along the conical surface, forming a laminar flow effect and reducing the direct impact of particulate matter on the filter.

[0032] The air guide part 161, the filter part 162 and the connecting part 163 are integrally formed, eliminating the gaps of traditional spliced ​​filter screens and preventing particulate matter from accumulating at the joints.

[0033] Existing technologies using single-layer planar filter structures have certain shortcomings in gas filtration. When dust-laden gas flows through the filter, particles tend to accumulate on the filter surface, reducing the gas flow cross-sectional area and significantly increasing flow resistance, leading to burner ignition failure. In this device, gas first enters through the conical tip of the second filter 17. Its conical structure gradually expands the airflow cross-section and reduces the flow velocity. Larger particles are intercepted by the second filter 17 due to inertia, achieving preliminary filtration and reducing the burden on subsequent filters. After passing through the second filter 17, the gas enters the inlet chamber 18 and then passes through the conical filtration section 162 of the first filter 16. The tapered structure of the filtration section 162 concentrates the airflow, accelerating its passage through the filter's micropores and improving the capture efficiency of small particles. Simultaneously, it avoids excessively high local flow velocities that could cause particles to become embedded in the filter. By employing a dual-filter system with sequential filtration, the filter life can be extended, the risk of clogging can be reduced, and the inlet chamber 18 reduces gas flow resistance.

[0034] The connecting part 163 is an annular structure adapted to the inner wall of the connecting sleeve 15.

[0035] The air guide section 161 is a hollow cylindrical structure with a spiral guide groove, and the end of the air guide section 161 is fixedly connected to the exhaust port of the connecting sleeve 15.

[0036] The outer wall of the air duct 6 is fixedly connected to a second valve 7, and the outer wall of the factory air inlet pipe 13 is equipped with a fifth valve 14.

[0037] The burner 2 is fixedly connected to an acid gas pipeline 3 and an oxygen pipeline 4, respectively, and a first valve 5 is installed on the outer wall of both pipelines.

[0038] The burner 2 is also connected to fuel gas pipe 1 8 and fuel gas pipe 2 10 respectively. A third valve 9 is fixedly connected to the outer wall of fuel gas pipe 1 8, and a fourth valve 11 is fixedly connected to the outer wall of fuel gas pipe 2 10.

[0039] The number of connecting rods 19 is at least two, which are evenly distributed in the circumferential direction between the first filter screen 16 and the second filter screen 17.

[0040] The first valve 5, the second valve 7, the third valve 9, the fourth valve 11, and the fifth valve 14 are all pneumatic control valves.

[0041] Currently, the common ignition methods for sulfur recovery units and flue gas incinerators in China are handheld ignition guns or torches. These methods require high operational and judgment skills from the operators. Since these two ignition methods use open flames to directly contact combustible gases for ignition, they are prone to explosion and pose certain safety hazards. In this device, the ignition method of first igniting the pneumatic ignition gun 12 with a small amount of gas and then using the flame of the pneumatic ignition gun 12 to ignite the main burner 2 can effectively improve the ignition success rate and avoid the risk of fuel gas accumulation and flash explosion when igniting the main burner.

[0042] Working principle: Before igniting the flame of the main burner 2, the initial state of each valve is checked first. After the conditions are met, the furnace is purged and the pneumatic ignition gun 12 is ignited. Before the pneumatic ignition gun 12 is ignited, the third valve 9 is opened and the fuel enters the pneumatic ignition gun 12 through the fuel gas pipe 1 8 and the fuel gas pipe 2 10. The fifth valve 14 is opened and the factory air inlet pipe 13 injects air into the pneumatic ignition gun 12. The second valve 7 is opened and the air enters the burner 2 through the air pipe 6. The pneumatic ignition gun 12 is ignited. The fuel enters the burner 2 through the fuel gas pipe 1 8 and is ignited by the pneumatic ignition gun 12.

[0043] During the gas flow process, the gas flows through the tip of the second filter screen 17 and gradually expands towards the tail. It is filtered by the second filter screen 17, enters the first filter screen 16 through the air inlet chamber 18, is filtered by the filter section 162, and is then concentrated by the filter section 162 and poured into the pipeline through the air guide section 161.

[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An automatic ignition device for the main combustion stage of a sulfur recovery unit, characterized in that, include: Combustion furnace (1), burner (2) fixed to the end of the combustion furnace; A pneumatic ignition gun (12) is fixedly installed on the outer wall of the burner (2), and the air inlet end of the pneumatic ignition gun (12) is connected to the factory air inlet pipe (13); An air duct (6) is fixedly installed on the outer wall of the burner (2); The air duct (6) and the factory air inlet duct (13) are connected together by a connecting sleeve (15); The inner wall of the connecting sleeve (15) is provided with a first filter screen (16), and a plurality of connecting rods (19) are fixedly installed on the inner wall of the first filter screen (16). The ends of the connecting rods (19) are fixedly connected to the second filter screen (17). An air inlet chamber (18) is formed between the first filter screen (16) and the second filter screen (17). The second filter screen (17) has a conical structure, and its tip faces the air inlet of the connecting sleeve (15). The first filter screen (16) includes an air guide part (161), a filter part (162) and a connecting part (163) that are connected to each other. The filter part (162) has a conical structure. The air guide part (161), the filter part (162) and the connecting part (163) are integrally formed structures.

2. The automatic ignition device for main combustion in the sulfur recovery unit according to claim 1, characterized in that: The connecting part (163) is an annular structure adapted to the inner wall of the connecting sleeve (15).

3. The automatic ignition device for main combustion in the sulfur recovery unit according to claim 2, characterized in that: The air guide section (161) is a hollow cylindrical structure with a spiral guide groove, and the end of the air guide section (161) is fixedly connected to the exhaust port of the connecting sleeve (15).

4. The automatic ignition device for main combustion in the sulfur recovery unit according to claim 3, characterized in that: The outer wall of the air duct (6) is fixedly connected to a second valve (7), and the outer wall of the factory air inlet pipe (13) is provided with a fifth valve (14).

5. The automatic ignition device for main combustion in the sulfur recovery unit according to claim 4, characterized in that: The burner (2) is fixedly connected to an acid gas pipeline (3) and an oxygen pipeline (4) on its outer wall, and a first valve (5) is provided on the outer wall of both pipelines.

6. The automatic ignition device for main combustion in the sulfur recovery unit according to claim 5, characterized in that: The burner (2) is also connected to fuel gas pipe one (8) and fuel gas pipe two (10) respectively. A third valve (9) is fixedly connected to the outer wall of fuel gas pipe one (8), and a fourth valve (11) is fixedly connected to the outer wall of fuel gas pipe two (10).

7. The automatic ignition device for main combustion in the sulfur recovery unit according to claim 6, characterized in that: The number of connecting rods (19) is at least two, and they are evenly distributed in the circumferential direction between the first filter screen (16) and the second filter screen (17).

8. The automatic ignition device for main combustion in the sulfur recovery unit according to claim 7, characterized in that: The first valve (5), the second valve (7), the third valve (9), the fourth valve (11) and the fifth valve (14) are all pneumatic regulating valves.

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