Tiny-oil ignition pulverized coal burner and combustion system

Abstract

The invention relates to the technical field of combustors, in particular to a tiny-oil ignition pulverized coal combustor and a combustion system.The tiny-oil ignition pulverized coal combustor comprises a protection box, a first suction fan is installed on the side face of the protection box, a filter box is installed at the top of the first suction fan, a guide pipe is fixedly connected to the top of the filter box, and the tail end of the guide pipe extends into the protection box; a heat preservation table is arranged on the inner bottom wall of the protection box, a second insertion pipe is arranged on the side face of the protection box and extends into the protection box, through cooperative use of the protection box, the first suction fan, the filter box and the second insertion pipe, exhaust smoke hot air in the protection box is exhausted through the first-stage exhaust fan, and impurities in the exhaust smoke hot air are removed through the filter box. Afterwards, the dry hot air is introduced into the protection box again through the guide pipe, an efficient circulation system is formed, and therefore discharged heat is effectively recycled, and energy waste is prevented. The process is energy-saving and environment-friendly, and the operation process is greatly facilitated through connection of the second insertion pipe and the combustion chamber.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to a micro-oil ignition pulverized coal burner and a combustion system. Background Art

[0002] The conventional method for boiler startup and low-load stable combustion in thermal power plants is to use a large oil gun to inject oil; taking a 300MW unit as an example, 50 to 100 tons of fuel oil are required from ignition to coal powder injection during cold start of the boiler with load, while the micro-oil cold furnace ignition and ultra-low load stable combustion technology uses a small amount of oil (corresponding to 50 kg / h to 400 kg / h of oil consumption for a single coal powder burner) to strengthen combustion, and ignites a large amount of coal powder through a specially designed burner, thereby achieving the purpose of starting the boiler with coal instead of oil; in addition, when the boiler is under low load, the burner can be put into use, and a small amount of oil can be used to achieve ultra-low load stable combustion of the boiler. This technology can greatly reduce the use of oil for ignition startup and combustion support in thermal power plants, reduce power generation costs, and create huge economic and social benefits for power companies.

[0003] The existing burners still have certain shortcomings during use.

[0004] 1. Current burners have poor performance in energy saving, which is not only not conducive to environmental protection, but also the heat they generate cannot be effectively recycled. They also release a lot of dust, which not only affects the processing quality, but also pollutes the environment.

[0005] 2. The structural design of the traditional burner is not convenient for achieving efficient combustion of coal powder. The burner is equipped with a special combustion chamber and nozzle, which cannot make the combustion more complete, thus significantly reducing the combustion efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a micro-oil ignition coal powder burner and combustion system to solve the problem that the current burners mentioned in the above background technology are not good in energy saving, which is not only not conducive to environmental protection, but also the heat generated cannot be effectively recycled and utilized. They also release a lot of dust, which not only affects the processing quality, but also pollutes the environment. The structural design of the traditional burner is not convenient for achieving efficient combustion of coal powder. The burner is equipped with a special combustion chamber and nozzle, which cannot burn more fully, thereby significantly reducing the combustion efficiency.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A micro-oil ignition pulverized coal burner comprises a protective box, a first suction fan is installed on the side of the protective box, a filter box is installed on the top of the first suction fan, a guide pipe is fixedly connected to the top of the filter box, the end of the guide pipe extends into the protective box, a heat preservation table is provided on the bottom wall of the protective box, a second plug pipe is provided on the side of the protective box, the second plug pipe extends into the protective box, a hair dryer is installed inside one end of the second plug pipe extending to the protective box, and a combustion chamber is plugged into the other end of the second plug pipe.

[0009] As a preferred solution of the present invention, a heat recovery box is provided at the other end of the combustion chamber, and a first plug is provided on the side of the heat recovery box. The first plug extends into the heat recovery box, and a third suction fan is installed inside the end of the first plug extending to the heat recovery box, and the first plug is plugged into the combustion chamber.

[0010] As a preferred solution of the present invention, a second suction fan is installed on the top of the heat recovery box, and a drainage pipe is fixedly connected to the top of the second suction fan, and the end of the drainage pipe extends into the protection box.

[0011] As a preferred solution of the present invention, a gear belt is fixedly connected to the middle outer surface of the combustion chamber, a drive motor is arranged on the side of the combustion chamber, and a toothed disc wheel is fixedly connected to the output end of the drive motor, and the toothed disc wheel is meshed with the gear belt.

[0012] As a preferred solution of the present invention, a protective layer is rotatably connected to the outer surface of the combustion chamber, and a support frame is fixedly connected to the bottom of the protective layer.

[0013] As a preferred solution of the present invention, a feed pipe is fixedly connected to the bottom of the combustion chamber, and an igniter is fixedly connected to the bottom of the combustion chamber.

[0014] As a preferred solution of the present invention, the drive motor is fixedly connected to a motor base, and the material of the motor base is stainless steel.

[0015] As a preferred solution of the present invention, two support frames are provided, and the two support frames are respectively located on both sides of the gear belt.

[0016] As a preferred solution of the present invention, a micro-oil ignition pulverized coal burner combustion system includes a combustion chamber and a monitoring system, characterized in that: the monitoring system includes a temperature sensor, a flame image monitoring camera and a wind speed sensor, the temperature sensor is arranged in the combustion chamber, and the flame image monitoring camera is installed at the end of the combustion chamber.

[0017] As a preferred solution of the present invention, two wind speed sensors are provided, and the two wind speed sensors are respectively located on the inner surface walls of the first insert tube and the second insert tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, by setting up the protective box, the first suction fan, the filter box and the second intubation tube, the exhaust hot air in the protective box is extracted through the first-stage exhaust fan, and the impurities therein are removed through the filter box. Subsequently, the dry hot air is reintroduced into the protective box through the guide pipe to form an efficient circulation system, thereby effectively recycling the exhausted heat and preventing energy waste. This process is not only energy-saving and environmentally friendly, but also greatly facilitates the operation process through the connection of the second intubation tube with the combustion chamber.

[0020] 2. In the present invention, by setting up the heat recovery box, the second suction fan, the drainage pipe and the first insertion pipe for coordinated use, by installing the drainage pipe at the upper end of the heat recovery box and the protection box, and ensuring the connection between them, and equipping the second suction fan at the connection between the heat recovery box and the drainage pipe, the device realizes the circulation connection between the protection box and the heat recovery box through the combustion chamber and the drainage pipe. This design allows heat energy to be recovered and recycled, thereby improving energy efficiency.

[0021] 3. In the present invention, by arranging the coordinated use of the gear belt, the toothed disc wheel, the driving motor and the protective layer, after starting the driving motor, the toothed disc wheel will drive the gear belt to rotate, thereby rotating the combustion chamber. This process helps the fuel in the combustion chamber to burn more fully. In order to enhance the heat preservation effect of the combustion chamber, a protective layer is specially designed on its outer surface. Such a design improves the heat preservation performance of the combustion chamber during operation, thereby enhancing its overall practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the side structure of the protection box and the heat recovery box of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the protection box of the present invention;

[0025] Figure 4 It is a schematic diagram of the side structure of the heat recovery box of the present invention;

[0026] Figure 5 It is a schematic diagram of the side structure of the combustion chamber of the present invention.

[0027] In the figure: 1. protection box; 2. first suction fan; 3. filter box; 4. guide pipe; 5. drainage pipe; 6. second suction fan; 7. heat recovery box; 8. combustion chamber; 9. protection layer; 10. gear belt; 11. gear wheel; 12. drive motor; 13. motor base; 14. first plug pipe; 15. second plug pipe; 16. support frame; 17. feed pipe; 18. igniter; 19. insulation table; 20. hair dryer; 21. third suction fan. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] For examples, see Figure 1-Figure 4 , the present invention provides a technical solution:

[0030] A micro-oil ignition pulverized coal burner and combustion system, comprising a protection box 1, a first suction fan 2 is installed on the side of the protection box 1, a filter box 3 is installed on the top of the first suction fan 2, a guide pipe 4 is fixedly connected to the top of the filter box 3, the end of the guide pipe 4 extends into the protection box 1, a heat preservation platform 19 is arranged on the bottom wall of the protection box 1, a second plug 15 is arranged on the side of the protection box 1, the second plug 15 extends into the protection box 1, and a hair dryer 20 is installed inside the second plug 15 extending to one end of the protection box 1, and the second plug 15 extends to the inside of the protection box 1. The other end of the insert pipe 15 is plugged into the combustion chamber 8, and the other end of the combustion chamber 8 is provided with a heat recovery box 7. A first insert pipe 14 is provided on the side of the heat recovery box 7, and the first insert pipe 14 extends into the heat recovery box 7. The first insert pipe 14 extends to one end of the heat recovery box 7 where a third suction fan 21 is installed. The first insert pipe 14 is plugged into the combustion chamber 8, and a second suction fan 6 is installed on the top of the heat recovery box 7. A drainage pipe 5 is fixedly connected to the top of the second suction fan 6, and the end of the drainage pipe 5 extends into the protective box 1.

[0031] Among them, a drainage pipe 5 is provided at the upper end of the heat recovery box 7 and the protection box 1, and they are connected. A second suction fan 6 is provided at the connection between the heat recovery box 7 and the drainage pipe 5. In this way, the protection box 1 of the device is connected to the heat recovery box 7 in a circular manner through the combustion chamber 8 and the drainage pipe 5, so that the heat energy can be guided back for rotational utilization, which greatly improves the energy-saving effect.

[0032] In this embodiment, according to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a gear belt 10 is fixedly connected to the middle outer surface of the combustion chamber 8, a drive motor 12 is arranged on the side of the combustion chamber 8, a toothed disc wheel 11 is fixedly connected to the output end of the drive motor 12, the toothed disc wheel 11 is meshed with the gear belt 10, a protective layer 9 is rotatably connected to the outer surface of the combustion chamber 8, a support frame 16 is fixedly connected to the bottom of the protective layer 9, a feed pipe 17 is fixedly connected to the bottom of the combustion chamber 8, an igniter 18 is fixedly connected to the bottom of the combustion chamber 8, a motor base 13 is fixedly connected to the drive motor 12, the material of the motor base 13 is stainless steel, two support frames 16 are arranged, and the two support frames 16 are respectively on both sides of the gear belt 10, the monitoring system includes a temperature sensor, a flame image monitoring camera and a wind speed sensor, the temperature sensor is arranged in the combustion chamber 8, the flame image monitoring camera is installed at the end of the combustion chamber 8, and two wind speed sensors are arranged, and the two wind speed sensors are respectively located on the inner surface walls of the first insert tube 14 and the second insert tube 15.

[0033] Among them, the protection box 1 is connected to the heat recovery box 7 in a loop through the combustion chamber 8 and the drainage pipe 5, so that the heat energy can be guided back for rotational utilization, which greatly improves the energy-saving effect, starts the drive motor 12, and then the toothed disc wheel 11 drives the gear belt 10 to rotate, thereby facilitating more complete combustion of the fuel in the combustion chamber 8.

[0034] Working process of the present invention: When a micro-oil ignition pulverized coal burner and combustion system designed by the present invention is in operation, first check whether the device is used normally, install the device in a suitable working area, and at the same time, put the processed material into the combustion chamber 8 through the feed pipe 17, and then close the feed pipe 17, start the drive motor 12 to drive the toothed disc wheel 11, the toothed disc wheel 11 is meshed with the gear belt 10, thereby driving the combustion chamber 8 to rotate, and the outer surface of the combustion chamber 8 is also rotatably connected with a protective layer 9 to effectively prevent heat loss, start the insulation table 19 to heat the protection box 1, extract the exhaust hot air from the protection box 1 through the first suction fan 2, and filter the impurities through the filter box 3, so that the dry hot air is reintroduced into the protection box 1 through the guide pipe 4 to form a cycle, effectively reuse the exhausted heat, avoid waste, save energy and protect the environment, and start the hair dryer 20 to discharge the hot air into the combustion chamber The heat in the combustion chamber 8 is recovered by starting the third suction fan 21. A drainage pipe 5 is provided at the upper end of the heat recovery box 7 and the protection box 1, and they are connected. A second suction fan 6 is provided at the connection between the heat recovery box 7 and the drainage pipe 5. In this way, the protection box 1 of the device is connected to the heat recovery box 7 in a circulation manner through the combustion chamber 8 and the drainage pipe 5, so that the heat energy can be guided back for rotational utilization, which greatly improves the energy saving effect. The drive motor 12 is started, and then the toothed disc wheel 11 drives the gear belt 10 to rotate, so as to facilitate the fuel in the combustion chamber 8 to burn more fully. At the same time, the temperature sensor is arranged in the combustion chamber 8, and the flame image monitoring camera is installed at the end of the combustion chamber 8. The two wind speed sensors are respectively located on the inner surface walls of the first tube 14 and the second tube 15, so as to facilitate observation and understanding by the staff.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A micro-oil ignition pulverized coal burner, comprising a protection box (1), characterized in that: A first suction fan (2) is installed on the side of the protection box (1), a filter box (3) is installed on the top of the first suction fan (2), a guide tube (4) is fixedly connected to the top of the filter box (3), the end of the guide tube (4) extends into the protection box (1), a heat preservation table (19) is arranged on the bottom wall of the protection box (1), a second plug tube (15) is arranged on the side of the protection box (1), the second plug tube (15) extends into the protection box (1), a hair dryer (20) is installed inside one end of the second plug tube (15) extending to the protection box (1), and the other end of the second plug tube (15) is plugged into the combustion chamber (8).

2. A micro-oil ignition pulverized coal burner according to claim 1, characterized in that: A heat recovery box (7) is arranged at the other end of the combustion chamber (8), a first plug pipe (14) is arranged on the side of the heat recovery box (7), the first plug pipe (14) extends into the heat recovery box (7), a third suction fan (21) is installed inside one end of the first plug pipe (14) extending to the heat recovery box (7), and the first plug pipe (14) is plugged into the combustion chamber (8).

3. A micro-oil ignition pulverized coal burner according to claim 2, characterized in that: A second suction fan (6) is installed on the top of the heat recovery box (7), and a drainage pipe (5) is fixedly connected to the top of the second suction fan (6), and the end of the drainage pipe (5) extends into the protection box (1).

4. A micro-oil ignition pulverized coal burner according to claim 1, characterized in that: A gear belt (10) is fixedly connected to the middle outer surface of the combustion chamber (8), a drive motor (12) is arranged on the side of the combustion chamber (8), and a toothed disc wheel (11) is fixedly connected to the output end of the drive motor (12), and the toothed disc wheel (11) is meshed with the gear belt (10).

5. A micro-oil ignition pulverized coal burner according to claim 1, characterized in that: The outer surface of the combustion chamber (8) is rotatably connected to a protective layer (9), and the bottom of the protective layer (9) is fixedly connected to a support frame (16).

6. A micro-oil ignition pulverized coal burner according to claim 1, characterized in that: A feed pipe (17) is fixedly connected to the bottom of the combustion chamber (8), and an igniter (18) is fixedly connected to the bottom of the combustion chamber (8).

7. A micro-oil ignition pulverized coal burner according to claim 4, characterized in that: The driving motor (12) is fixedly connected to a motor base (13), and the material of the motor base (13) is stainless steel.

8. A micro-oil ignition pulverized coal burner according to claim 5, characterized in that: Two support frames (16) are provided, and the two support frames (16) are respectively located on both sides of the gear belt (10).

9. A combustion system for a micro-oil ignition pulverized coal burner, suitable for a micro-oil ignition pulverized coal burner as claimed in claims 1 to 8, comprising a combustion chamber (8) and a monitoring system, characterized in that: The monitoring system comprises a temperature sensor, a flame image monitoring camera and a wind speed sensor; the temperature sensor is arranged in the combustion chamber (8); and the flame image monitoring camera is installed at the end of the combustion chamber (8).

10. A combustion system of a micro-oil ignition pulverized coal burner according to claim 9, characterized in that: Two wind speed sensors are provided, and the two wind speed sensors are respectively located on the inner surface walls of the first insert pipe (14) and the second insert pipe (15).

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