Three-channel gas supply rotational flow combustion system

Abstract

The utility model provides a three-channel gas supply rotational flow combustion system. Relates to the field of combustors and comprises a first air pipe, a second air pipe, a third air pipe and a combustion chamber, the combustion chamber comprises a combustion cavity and a cooling cavity surrounding the combustion cavity, one end of the first air pipe is connected into a fuel storage tank, and the other end of the first air pipe is connected into the combustion cavity of the combustion chamber; one end of the second air pipe is connected into a combustion-supporting air source, the other end of the second air pipe is divided into a first branch pipe and a second branch pipe, and the first branch pipe is communicated with the first air pipe. The air and the fuel are premixed in the premixing section, so that the mixing uniformity of the fuel and the air is improved, the problem of insufficient combustion of the fuel is solved, the fuel and the air are mixed more uniformly, the combustion is more sufficient, the amount of the fuel which is not completely combusted is reduced, and the generation of oxynitride is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of combustor, in particular to a three-channel gas supply cyclone combustion system. BACKGROUND

[0002] The existing hydrogen gas fuel gas turbine utilizes three-channel gas supply cyclone combustor to realize stable hydrogen gas combustion, and has obvious advantages in low nitrogen oxide emission.

[0003] The existing three-channel gas supply cyclone combustor is supplied with gas through three independent pipelines, and the gas and air need to be mixed in the combustion chamber before combustion, which is easy to cause insufficient fuel combustion and generate a large amount of nitrogen oxides. UTILITY MODEL CONTENT

[0004] The utility model discloses a three-channel gas supply cyclone combustion system, which introduces the preheated combustion air into the first air pipe through the first branch pipe of the second air pipe, pre-mixes with the fuel in the pre-mixing section, improves the mixing uniformity of the fuel and air, solves the problem of insufficient fuel combustion, and reduces the generation of nitrogen oxides due to more uniform mixing of the fuel and air and more complete combustion.

[0005] In order to achieve the above-mentioned purpose, the following technical scheme is adopted:

[0006] A three-channel gas supply cyclone combustion system, comprising a first air pipe, a second air pipe, a third air pipe and a combustion chamber, the combustion chamber comprising a combustion cavity and a cooling cavity arranged around the combustion cavity, one end of the first air pipe being connected to a fuel storage tank, and the other end being connected to the combustion cavity of the combustion chamber; one end of the second air pipe being connected to a combustion air source, and the other end being divided into a first branch pipe and a second branch pipe, the first branch pipe being connected to the first air pipe, a heater being installed at one end of the first branch pipe close to the first air pipe, the second branch pipe being connected to the combustion cavity, and the first air pipe between the first branch pipe connected to the first air pipe and the combustion cavity serving as a pre-mixing section; one end of the third air pipe being connected to a cooling air source, and the other end being connected to the cooling cavity.

[0007] Further, one end of the combustion cavity is an inlet and is provided with a cyclone, and the first air pipe and the second branch pipe are connected to the combustion cavity through the cyclone.

[0008] Further, one end of the cooling cavity is an inlet to connect to the third air pipe, and the other end is an outlet.

[0009] Further, a flow meter is installed at the entrance of the combustion cavity, and a positive pressure chamber is arranged outside the position where the combustion cavity is connected with the first air pipe and the second branch pipe.

[0010] Further, the combustion chamber comprises an inner container and an outer shell, the inner container forms the combustion cavity inside, the outer shell is sleeved outside the inner container, a cooling cavity is formed between the outer shell and the inner container, and transparent windows are arranged on the inner container and the outer shell respectively.

[0011] Further, flow meters and electromagnetic valves are installed on the first branch pipe, the second branch pipe, the first air pipe and the third air pipe respectively.

[0012] Further, a pressure stabilizing tank is connected in series on the first air pipe, and the pressure stabilizing tank is located between the position where the first branch pipe is communicated with the first air pipe and the fuel storage tank.

[0013] Further, a thermocouple is installed on the first branch pipe, and the thermocouple is located between the position where the first branch pipe is communicated with the first air pipe and the heater.

[0014] Further, the first branch pipe is vertically communicated with the first air pipe.

[0015] Further, the second air pipe is connected with a combustion-supporting gas source through a blower, and one end of the third air pipe is connected with a cooling air source through a blower.

[0016] Compared with the prior art, the utility model has the advantages and positive effects that:

[0017] In view of the problem that the fuel combustion is insufficient and a large amount of nitrogen oxides are generated, the preheated combustion-supporting air is introduced into the first air pipe through the first branch pipe of the second air pipe, and is premixed with the fuel in the premixing section, so that the mixing uniformity of the fuel and air is improved, and the problem of insufficient fuel combustion is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the specification of the utility model are used to provide further understanding of the utility model, and the schematic embodiment of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0019] Figure 1 It is a schematic diagram of the three-channel gas supply cyclone combustion system in the embodiment of the utility model.

[0020] In the figure, 1, fuel storage tank; 2, pressure stabilizing tank; 3, first valve; 4, first flow meter; 5, heater; 6, second valve; 7, second flow meter; 8, third valve; 9, third flow meter; 10, fourth valve; 11, thermocouple; 12, fourth flow meter; 13, transparent window; 14, combustion chamber; 15, positive pressure chamber; 16, third air pipe; 17, first branch pipe; 18, second branch pipe; 19, first air pipe; 20, second air pipe. DETAILED DESCRIPTION

[0021] In a typical embodiment of the present application, as shown in Figure 1 a three-channel gas supply cyclone combustion system is proposed.

[0022] The existing three-channel gas supply cyclone burner, when in use, since the fuel gas and air need to be mixed in the combustion chamber 14, the mixing process may be uneven, resulting in some fuel failing to fully contact with the air, causing insufficient combustion. Insufficient fuel combustion will produce a large amount of nitrogen oxides (NOx), which is a harmful gas and has a negative impact on the environment. Based on this, the present embodiment provides a three-channel gas supply cyclone combustion system, aiming to solve the problems of insufficient fuel combustion and high nitrogen oxide emissions.

[0023] As shown in Figure 1 the three-channel gas supply cyclone combustion system, comprising a first air pipe 19, a second air pipe 20, a third air pipe 16 and a combustion chamber 14, the first air pipe 19 is used for conveying fuel, one end is connected to the fuel storage tank 1, the other end is connected to the combustion cavity of the combustion chamber 14. The second air pipe 20 is used for conveying combustion air, one end is connected to the combustion air source, the other end is divided into a first branch pipe 17 and a second branch pipe 18. The first branch pipe 17 is connected to the first air pipe 19, and a heater 5 is installed at one end close to the first air pipe 19, which is used to preheat the combustion air, promote the mixing and combustion of fuel and air. The second branch pipe 18 is directly connected to the combustion cavity to provide additional combustion air. The first branch pipe 17, which is connected between the first air pipe 19 at the pre-mixing section and the first air pipe 19, is the area where the fuel and preheated combustion air are premixed. The third air pipe 16 is used for conveying cooling air, one end is connected to the cooling air source, the other end is connected to the cooling cavity of the combustion chamber 14, which is used to cool the combustion chamber 14 and protect it from high temperature damage.

[0024] The combustion chamber 14 includes a combustion cavity and a cooling cavity arranged around the combustion cavity, the combustion cavity is located inside the combustion chamber 14, which is the place where fuel and combustion air are mixed and burned. The cooling cavity is arranged around the combustion cavity and is used to receive cooling air provided by the third air pipe 16 to prevent the combustion chamber 14 from overheating. The preheated combustion air is introduced into the first air pipe 19 through the first branch pipe 17 of the second air pipe 20, and is premixed with the fuel in the pre-mixing section, which improves the uniformity of the mixing of fuel and air, thereby solving the problem of insufficient fuel combustion.

[0025] The premixing and uniform combustion of fuel and air improve the combustion efficiency and reduce the waste of energy. The more complete combustion reduces the generation of nitrogen oxides and is more environmentally friendly. The cooling air provided by the cooling chamber protects the combustion chamber 14, enabling it to operate stably in a high-temperature environment. The compact system structure reduces the floor area, and the connection design of each component is reasonable, facilitating daily maintenance and repair.

[0026] As shown in Figure 1 , one end of the combustion chamber is designed as an inlet and is equipped with a swirler, and the other end is an outlet for discharging the burned exhaust gas. The swirler functions to cause the fuel and air entering the combustion chamber to produce rotational flow, which helps to mix the fuel and air thoroughly and improves the combustion efficiency. The first air pipe 19 and the second branch pipe 18 are connected to the combustion chamber through the swirler, the first air pipe 19 is used to transport fuel, and the second branch pipe 18 is used to transport combustion air, ensuring that the fuel and air enter the combustion area in a rotational manner. In this embodiment, the swirler is a swirler nozzle, and the first air pipe 19 and the second air pipe 20 communicate with the swirler nozzle and the combustion chamber 14 of the combustion chamber.

[0027] It can be understood that the end of the second branch pipe 18 can form multiple outlets to access the combustion chamber from multiple positions, so that the combustion air can be fully dispersed to facilitate the mixing of combustion air and fuel.

[0028] One end of the cooling chamber is designed as an inlet to interface with the third air pipe 16 to input cooling air into the cooling chamber, and the other end is an outlet for discharging the cooled air or exhaust gas. This ensures that the cooling air can flow uniformly through the cooling chamber, effectively reducing the temperature of the outer shell of the combustion chamber 14.

[0029] A flow meter is installed at the inlet of the combustion chamber to monitor the flow of fuel and air entering the combustion chamber, ensuring the stability and controllability of the combustion process. The position where the combustion chamber connects the first air pipe 19 and the second branch pipe 18 is externally provided with a positive pressure chamber 15. The function of the positive pressure chamber 15 is to maintain the pressure in the combustion chamber stable, preventing external air or impurities from entering the combustion system and affecting the combustion effect.

[0030] As shown in Figure 1 , the combustion chamber 14 is composed of an inner shell and an outer shell. The inner shell forms a combustion chamber inside for fuel combustion; the outer shell is sleeved outside the inner shell, and the cooling chamber is formed between the outer shell and the inner shell for cooling the combustion chamber 14. The inner shell and the outer shell are respectively provided with transparent windows 13 for observing the combustion process and the cooling effect of the cooling chamber, facilitating fault diagnosis and maintenance.

[0031] The first branch pipe 17, the second branch pipe 18, the first air pipe 19 and the third air pipe 16 are respectively provided with flow meters and electromagnetic valves. The flow meters are used to monitor the flow of each pipe, and the electromagnetic valves are used to control the opening and closing of each pipe to achieve precise flow control. In this embodiment, the first air pipe 19 is provided with a first valve 3 and a first flow meter 4, the first branch pipe 17 is provided with a second valve 6 and a second flow meter 7, the second branch pipe 18 is provided with a third valve 8 and a third flow meter 9, and the third air pipe 16 is provided with a fourth valve 10 and a fourth flow meter 12. It can be understood that by controlling the opening of the electromagnetic valve, the ratio of fuel gas to premixed air can be adjusted, thereby adjusting the combustion state of the fuel gas in the combustion chamber.

[0032] The first air pipe 19 is provided with a pressure stabilizing tank 2 between the first branch pipe 17 and the fuel storage tank 1. The function of the pressure stabilizing tank 2 is to stabilize the fuel pressure, ensuring that the fuel enters the combustion chamber at a constant pressure, thereby improving the stability of the combustion.

[0033] The first branch pipe 17 is provided with a thermocouple 11 between the first branch pipe 17 and the heater 5. The thermocouple 11 is used to monitor the temperature of the preheated combustion air, ensuring that the combustion air enters the premixing section at an appropriate temperature, promoting the thorough mixing of fuel and air. The first branch pipe 17 is connected to the first air pipe 19, and a heater 5 is installed at the end close to the first air pipe 19, which is used to preheat the combustion air, promoting the mixing and combustion of fuel and air. The heater 5 can use electromagnetic heating elements, heating wires, etc.

[0034] The first branch pipe 17 is vertically connected to the first air pipe 19, which helps to form a uniform mixture of fuel and preheated combustion air in the premixing section. The second air pipe 20 is connected to the combustion gas source through a blower, and one end of the third air pipe 16 is also connected to the cooling air source through a blower. The function of the blower is to provide stable airflow, ensuring that the combustion air and cooling air can continuously and uniformly enter the corresponding pipes.

[0035] Through the design of the cyclone, the premixing section and the heater 5, the uniformity of the mixing of fuel and air is improved, and the problem of incomplete combustion is solved. Through the design of the cooling chamber, the transparent window 13 and the thermocouple 11, precise control and monitoring of the temperature of the combustion chamber 14 is achieved.

[0036] Through the design of the flow meters, electromagnetic valves and pressure stabilizing tank 2, precise control of the flow of fuel and air is achieved, improving the stability and controllability of the combustion system. The thorough mixing of fuel and air and the uniform combustion improve the combustion efficiency and reduce the waste of energy. More complete combustion reduces the generation of harmful substances and reduces the impact of emissions on the environment.

[0037] Precise flow control and temperature monitoring enhance the stability and reliability of the system, reducing the likelihood of failure. The transparent window 13 and modular design make system maintenance more convenient, reducing maintenance costs.

[0038] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-channel air supply cyclone combustion system, characterized in that: The combustion chamber comprises a first air duct, a second air duct, a third air duct and a combustion chamber. The combustion chamber comprises a combustion chamber and a cooling chamber arranged around the combustion chamber. One end of the first air duct is connected to the fuel storage tank, and the other end is connected to the combustion chamber of the combustion chamber. One end of the second air duct is connected to the combustion air source, and the other end is divided into a first branch and a second branch. The first branch is connected to the first air duct, and a heater is installed at the end of the first branch close to the first air duct. The second branch is connected to the combustion chamber, and the first branch is connected to the first air duct between the first air duct and the combustion chamber as a premixing section; one end of the third air duct is connected to the cooling air source, and the other end is connected to the cooling chamber.

2. The three-channel air supply cyclone combustion system according to claim 1, characterized in that: One end of the combustion chamber is an inlet and is equipped with a swirler. The first air duct and the second branch pipe are connected to the combustion chamber through the swirler. The other end of the combustion chamber is an outlet.

3. The three-channel air supply cyclone combustion system according to claim 2, characterized in that: One end of the cooling cavity is an inlet for connecting to the third air duct, and the other end is an outlet.

4. The three-channel air supply cyclone combustion system according to claim 2 or 3, characterized in that: A flow meter is installed at the inlet of the combustion chamber, and a positive pressure chamber is provided outside the position where the combustion chamber is connected to the first air duct and the second branch pipe.

5. The three-channel air supply cyclone combustion system according to claim 4, characterized in that: The combustion chamber includes an inner liner and an outer shell. A combustion chamber is formed inside the inner liner. The outer shell is sleeved outside the inner liner. A cooling chamber is formed between the outer shell and the inner liner. Transparent windows are respectively provided on the inner liner and the outer shell.

6. The three-channel air supply cyclone combustion system according to claim 1, characterized in that: The first branch pipe, the second branch pipe, the first air duct and the third air duct are respectively installed with a flow meter and a solenoid valve.

7. The three-channel air supply cyclone combustion system according to claim 1 or 6, characterized in that: A pressure stabilizing tank is connected in series to the first air duct, and the pressure stabilizing tank is located between the point where the first branch pipe is connected to the first air duct and the fuel storage tank.

8. The three-channel air supply cyclone combustion system according to claim 1, characterized in that: A thermocouple is installed on the first branch pipe, and the thermocouple is located between the portion where the first branch pipe is connected to the first air duct and the heater.

9. The three-channel air supply cyclone combustion system according to claim 1 or 8, characterized in that: The first branch pipe is vertically connected to the first air duct.

10. The three-channel air supply cyclone combustion system according to claim 1, characterized in that: The second air duct is connected to a combustion-supporting gas source through a blower, and one end of the third air duct is connected to a cooling air source through a blower.

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