A PMC burner for a PMC combustion system

Abstract

The invention discloses a PMC burner for a PMC combustion system, which includes a turbofan, a cylindrical shell, an annular metal pipe, a fuel nozzle and an ignition electrode; the air outlet of the turbofan is connected to the rear end of the cylindrical shell, a circle of annular metal pipes is arranged around the inner wall of the cylindrical shell, the annular metal pipe is provided with a PMC fuel inlet for communicating with a fuel delivery pipeline, the fuel nozzles are evenly distributed on the annular metal pipe, the nozzles of each fuel nozzle are located in front of the annular metal pipe, and the nozzles face the center of the cylindrical shell, the ignition electrode is arranged on the inner wall of the cylindrical shell, and is located at the front end of the fuel nozzle, the wind blown by the turbofan is mixed with the PMC fuel sprayed by the fuel nozzle again to form a PMC fuel combustible gas that can be fully burned, and the ignition electrode is used to ignite the PMC fuel combustible gas. It has the characteristics of safe and reliable operation and high combustion efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of PMC fuel application. Background Art

[0002] At present, when producing asphalt concrete, heating furnaces using natural gas or heavy oil as fuel are generally used for heating, which has problems such as high combustion costs and serious air pollution. PMC fuel is a solid powdered fuel. As a new type of fuel, it has been widely used in garbage incinerators, but has not yet been used in the production process of asphalt concrete. In the production process of asphalt concrete, it requires a large combustion power to heat it. The equipment currently used with PMC fuel as fuel does not have the required power. This system is specially designed for the production of asphalt concrete. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a PMC burner for a PMC combustion system, which has the characteristics of safe and reliable operation, high combustion efficiency and the like.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A PMC burner for a PMC combustion system comprises a turbofan, a cylindrical shell, an annular metal pipe, a fuel nozzle and an ignition electrode;

[0006] The air outlet of the turbofan is connected to the rear end of the cylindrical shell. A circle of annular metal pipe is provided on the inner wall of the cylindrical shell. The annular metal pipe is provided with a PMC fuel inlet for connecting with the fuel delivery pipeline. Fuel nozzles are evenly distributed on the annular metal pipe. The nozzle of each fuel nozzle is located in front of the annular metal pipe, and its nozzle is facing the center of the cylindrical shell. The ignition electrode is arranged on the inner wall of the cylindrical shell and at the front end of the fuel nozzle. The wind blown by the turbofan is mixed with the PMC fuel sprayed from the fuel nozzle again to form PMC fuel combustible gas that can be fully burned. The ignition electrode is used to ignite the PMC fuel combustible gas so that the flame is sprayed from the flame injection port at the front end of the cylindrical shell.

[0007] The present invention is further improved in that:

[0008] The annular metal tube is coaxial with the PMC fuel combustible gas generating chamber.

[0009] Each fuel nozzle adopts an elbow pipe fitting, the diameter of which is 1 / 4 to 1 / 6 of the diameter of the annular metal pipe.

[0010] The nozzle of each fuel nozzle is arranged obliquely to form a rotating flame under the jet action of the turbofan.

[0011] The beneficial effects of adopting the above technical solution are:

[0012] The air outlet of the turbofan fan is connected to the rear end of the cylindrical shell. A circle of annular metal tube is provided on the inner wall of the annular cylindrical shell. The air ejected from the jet port of the turbofan fan passes through the annular cylindrical shell. The annular metal tube is provided with a PMC fuel inlet for connecting with the fuel delivery pipeline. Fuel nozzles are evenly distributed on the annular metal tube. The nozzle of each fuel nozzle is located in front of the annular metal tube, and its nozzle faces the center of the cylindrical shell. The high-pressure gas mixed with the PMC fuel and air ejected by each nozzle crosses with the air ejected from the jet port of the turbofan fan during the process of moving from the periphery to the center of the air flow, so as to be fully and evenly mixed with it to form a mixed combustible with air for full combustion. The ignition electrode is arranged on the inner wall of the cylindrical shell and is located at the front end of the fuel nozzle to ignite the mixed combustible so that it can be fully burned.

[0013] It has the characteristics of safe and reliable operation and high combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the PMC combustion system;

[0016] Figure 3 yes Figure 2 Schematic diagram of the structure of the PMC fuel storage device;

[0017] Figure 4 yes Figure 2 Schematic diagram of the structure of the PMC fuel tank;

[0018] Figure 5 yes Figure 2 Schematic diagram of the structure of the PMC fuel conveyor;

[0019] Figure 6 yes Figure 5 Schematic diagram of the internal structure of the PMC fuel discharge chamber;

[0020] Figure 7 yes Figure 1 Schematic diagram of the structure of the dry gas source generator for PMC process control.

[0021] In the attached drawings: 1. PMC fuel storage chamber; 2. PMC fuel feed pipe; 3. Air source pipe; 4. One-way valve; 5. Bag filter; 6. induced draft fan; 7. Bag filter inlet; 8. Exhaust duct; 9. Butterfly valve; 10. PMC negative pressure sealing dust removal device connecting port; 11. PMC fuel conveyor connecting port; 12. Agitator chamber; 13. PMC fuel discharge device feed port; 14. PMC fuel discharge chamber; 15. PMC fuel discharge device discharge port; 16. Scraper shaft; 17. Scraper; 18. Bearing seat; 19. Driving motor; 20. Fuel delivery pipeline; 21. High-pressure air delivery pipe; 22. Turbofan fan; 23. Cylindrical shell; 24. Annular metal pipe; 25. Fuel nozzle; 26. Ignition electrode; 27. Viewing hole. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] For the convenience of explanation, the present invention is described in detail by taking the PMC combustion system as an example.

[0024] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, and bonding in the prior art, which will not be described in detail here.

[0025] Depend on Figures 1 to 7 As can be seen from the embodiment shown, this embodiment includes a PMC fuel storage device, a PMC fuel conveyor, a PMC process control dry gas source generating device, a PMC material high-pressure air mixing and dilution conveying device and a PMC burner;

[0026] The PMC fuel storage device includes a PMC fuel bin and a PMC negative pressure sealed dust removal device;

[0027] The PMC fuel bin comprises a PMC fuel storage chamber 1, a PMC fuel feed pipe 2 and a PMC flow-aiding device. A PMC negative pressure sealed dust removal device connecting port 10 is provided above the PMC fuel storage chamber 1, and a PMC fuel conveyor connecting port 11 is provided below the PMC fuel storage chamber 1. The outer wall of the PMC fuel feed pipe 2 is sealedly connected to the inner wall of the PMC fuel storage chamber 1. The feed port of the PMC fuel feed pipe 2 is located outside the PMC fuel storage chamber 1, and the discharge port of the PMC fuel feed pipe 2 is located at the PMC fuel storage chamber 1. The interior of the MC fuel storage chamber 1 is used to pneumatically transport the PMC material from the tank truck to the PMC fuel storage chamber 1; the PMC flow-aiding device is located at the bottom of the PMC fuel storage chamber 1, and the PMC flow-aiding device includes a plurality of one-way valves 4, the air inlet port of each one-way valve is connected to the air source pipe 3, the air source pipe 3 is connected to the PMC process control dry air source generating device, the air outlet of the one-way valve 4 is arranged upward, and the air flow ejected by the PMC flow-aiding device through the air outlet of the one-way valve 4 loosens the PMC fuel in the PMC fuel storage chamber 1;

[0028] The PMC negative pressure sealed dust removal device includes a bag dust collector 5, an exhaust pipe 8 and an induced draft fan 6. The bag dust collector inlet 7 is sealedly connected to the PMC negative pressure sealed dust removal device connecting port 10 of the PMC fuel storage chamber 1. The bag dust collector outlet is connected to the air inlet of the induced draft fan 6 through the exhaust pipe 8, and the air outlet of the induced draft fan 6 is connected to the atmosphere. A butterfly valve 9 is installed in the exhaust pipe 8, and the opening of the butterfly valve is controlled by the PLC controller, thereby controlling the pressure in the PMC fuel storage chamber 1.

[0029] The PMC fuel conveyor includes a PMC fuel agitator and a PMC fuel discharging device. The PMC fuel agitator includes a stirrer chamber 12, a stirring shaft and stirring blades. The stirring shaft is provided with stirring blades. The upper port of the stirrer chamber 12 is sealedly connected to a PMC fuel conveyor communication port 11 at the bottom of the PMC fuel storage chamber 1. The bottom wall of the stirrer chamber 12 is provided with a stirring shaft rotation connection hole and a PMC fuel discharging device feed port 13. The stirring shaft is rotationally connected to the stirring shaft rotation connection hole. The stirring shaft rotation connection hole and the stirring shaft are rotationally sealedly connected via a sealing ring.

[0030] The PMC fuel discharge device is located below the PMC fuel agitator, and includes a PMC fuel discharge chamber 14, a scraper 17, a scraper shaft 16 and a drive motor 19. The top wall of the PMC fuel discharge chamber 14 is the bottom wall of the agitator chamber 12. A PMC fuel discharge device discharge port 15 is provided on the bottom wall of the PMC fuel discharge chamber 14. A scraper shaft 16 is provided in the PMC fuel discharge chamber 14. A scraper 17 is provided circumferentially on the scraper shaft 16. The scraper shaft 16 is rotatably connected to the bottom wall of the PMC fuel discharge chamber 14 through a bearing seat 18. The upper end of the scraper shaft 16 is fixedly connected to the agitator shaft of the PMC fuel agitator. A pulley is provided at the lower end of the scraper shaft 16 for transmission connection with the drive motor 19.

[0031] The PMC process control dry gas source generating device includes an air compressor [model: SF10A], a refrigerated dryer [model: GJ1.5], an activated carbon adsorption device and a membrane separation nitrogen generator [model: Whisper series LCMS membrane separation nitrogen generator]. The activated carbon adsorption device includes an activated carbon containing box. The left wall of the activated carbon containing box is provided with an activated carbon adsorption device air inlet, and the right wall is provided with an activated carbon adsorption device air outlet. The activated carbon containing box is filled with activated carbon. The air outlet of the air compressor and the air inlet of the refrigerated dryer are connected to each other. The refrigerated dryer is used to dehumidify and dry the compressed air generated by the air compressor. The air outlet of the refrigerated dryer is connected to the air inlet of the activated carbon adsorption device. The activated carbon adsorption device is used to dehumidify and deoil the compressed air again. The air outlet of the activated carbon adsorption device is connected to the air inlet of the membrane separation nitrogen generator. The membrane separation nitrogen generator is used to separate nitrogen and oxygen from the compressed air. The nitrogen separated by the membrane separation nitrogen generator forms a PMC process control dry air source generating device, which is connected to the air source pipe of the PMC flow aid device through its nitrogen separation outlet;

[0032] The PMC material high-pressure air mixing dilution conveying device comprises a fuel conveying pipeline 20 and a high-pressure air conveying pipe 21, the PMC fuel discharge device discharge port 15 of the PMC fuel discharge device is connected with the feed port of the fuel conveying pipeline 20, the jet port of the high-pressure air conveying pipe 21 is connected with the position close to the feed port of the fuel conveying pipeline 20, the air inlet of the high-pressure air conveying pipe 21 is used to communicate with a compressed air source, the compressed air injected from the jet port of the high-pressure air conveying pipe 21 is used to form a flammable mixture of PMC material and air in the fuel conveying pipeline 20, and the fuel conveying pipeline 20 is connected with the PMC burner;

[0033] The PMC burner includes a turbofan 22, a cylindrical shell 23, an annular metal tube 24, a fuel nozzle 25 and an ignition electrode 26. The air outlet of the turbofan 22 is connected to the rear end of the cylindrical shell 23. A circle of annular metal tube 24 is provided on the inner wall of the cylindrical shell 23. The annular metal tube 24 is provided with a PMC fuel inlet for communicating with the fuel delivery pipeline 20. The fuel nozzles 25 are evenly distributed on the annular metal tube 24. The nozzle of each fuel nozzle 25 is located in front of the annular metal tube 24, and its nozzle faces the center of the cylindrical shell 23. The ignition electrode 26 is arranged on the inner wall of the cylindrical shell 23 and at the front end of the fuel nozzle 25. The wind blown by the turbofan 22 and the PMC fuel sprayed by the fuel nozzle 25 are mixed again to form PMC fuel combustible gas that can be fully burned. The ignition electrode 26 is used to ignite the PMC fuel combustible gas so that the flame is sprayed from the flame injection port at the front end of the cylindrical shell 23.

[0034] Four scrapers 17 are provided on the scraper shaft 16 in the circumferential direction.

[0035] Each fuel nozzle 25 is an elbow pipe, and its diameter is 1 / 4 to 1 / 6 of the diameter of the annular metal pipe 24 .

[0036] The nozzle of each fuel nozzle 25 is arranged at an angle so as to form a rotating flame under the jet action of the turbofan.

[0037] The agitator chamber 12 is provided with a viewing hole 27 for convenient inspection of the internal conditions.

Claims

1. A PMC burner for a PMC combustion system, characterized in that: It includes a turbofan (22), a cylindrical shell (23), an annular metal pipe (24), a fuel nozzle (25) and an ignition electrode (26); The air outlet of the turbofan (22) is connected to the rear end of the cylindrical shell (23), and a ring-shaped metal tube (24) is arranged around the inner wall of the cylindrical shell (23). The ring-shaped metal tube (24) is provided with a PMC fuel inlet for communicating with the fuel delivery pipeline (20). Fuel nozzles (25) are evenly distributed on the ring-shaped metal tube (24), and the nozzle of each fuel nozzle (25) is located in front of the ring-shaped metal tube (24), and its nozzle faces the center of the cylindrical shell (23). The ignition electrode (26) is arranged on the inner wall of the cylindrical shell (23) and is located at the front end of the fuel nozzle (25). The wind blown by the turbofan (22) and the PMC fuel sprayed by the fuel nozzle (25) are mixed again to form PMC fuel combustible gas that can be fully burned. The ignition electrode (26) is used to ignite the PMC fuel combustible gas so that the flame is sprayed from the flame spraying port at the front end of the cylindrical shell (23); The nozzle of each fuel nozzle (25) is arranged obliquely so as to form a rotating flame under the jet action of the turbofan; Each of the fuel nozzles (25) is an elbow pipe, the diameter of which is 1 / 4 of the diameter of the annular metal pipe (24).

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