Ignition structure of coal powder hot blast stove

Abstract

The utility model provides a kind of coal powder hot blast furnace ignition structure, belong to hot blast furnace ignition device technical field.The coal powder hot blast furnace ignition structure includes shell body, oil-gas mixing delivery assembly, electronic ignition needle.Aerosolizing nozzle is installed in oil pipe end, gas pipe one end is communicated with oil pipe and is set to be arranged in the through rear end shell, oil pipe section is successively installed with first flow control valve, first check valve along the feed direction, and gas pipe is successively installed with second flow control valve, second check valve along the feed direction.Electronic ignition needle is installed in rear end shell interior close to aerosolizing nozzle position.This design can improve the premixing effect of oil and gas, the oil particles sprayed from aerosolizing nozzle and gas are mixed more fully, combustion is also more fully, improve the combustion efficiency of oil.The setting of first flow control valve, second flow control valve is used to control the amount of oil, gas, so that oil and gas can be mixed and sprayed with better ratio to be burned.

Description

Technical Field

[0001] This utility model relates to the technical field of hot blast stove ignition devices, and more specifically, to an ignition structure for a pulverized coal hot blast stove. Background Technology

[0002] A pulverized coal hot blast stove is a high-temperature hot air equipment that uses pulverized coal as fuel. The ignition device of a pulverized coal hot blast stove has relatively low combustion efficiency. For example, the ignition device of a pulverized coal hot blast stove, as disclosed in the public document CN203068511U, includes an oil pipe with an atomizing nozzle installed at one end within the ignition device housing cavity, and an electronic ignition needle. The atomizing nozzle end of the oil pipe and the ignition end of the electronic ignition needle are installed in an ignition chamber located at the front end of the ignition device housing cavity via a fixed connector.

[0003] The oil supply pipeline used in the above-mentioned pulverized coal hot air stove sprays oil through atomizing nozzles and combines it with the air introduced through the air duct for combustion. The oil mist particles sprayed by the atomizing nozzles relying solely on oil pressure are relatively coarse, resulting in incomplete combustion and high oil consumption. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an ignition structure for a pulverized coal hot blast stove, aiming to improve the problem that the oil mist particles sprayed by the atomizing nozzle relying solely on oil pressure in the ignition structure of related hot blast stoves are relatively coarse, resulting in incomplete combustion and high oil consumption.

[0005] This utility model is implemented as follows: This utility model provides an ignition structure for a pulverized coal hot blast stove, including an outer shell, an oil-gas mixing and conveying assembly, and an electronic ignition needle.

[0006] The oil-gas mixing and conveying assembly includes an oil pipe, a gas pipe, and an atomizing nozzle. One end of the oil pipe is installed inside the rear end housing, and the atomizing nozzle is installed at the end of the oil pipe. One end of the gas pipe is installed through the rear end housing and connected to the oil pipe. A first flow control valve and a first check valve are installed sequentially along the feeding direction of the oil pipe section, and a second flow control valve and a second check valve are installed sequentially along the feeding direction of the gas pipe. The electronic ignition needle is installed inside the rear housing near the atomizing nozzle.

[0007] In one embodiment of this utility model, a spherical shell is provided at one end of the oil delivery pipe near the atomizing nozzle, and a dispersing element is provided inside the spherical shell.

[0008] In one embodiment of the present invention, the dispersing component includes a dispersing plate, and multiple sets of the dispersing plates are fixedly arranged in a ring array inside the spherical shell, with gaps between adjacent dispersing plates.

[0009] In one embodiment of this utility model, a guide plate that expands and tilts towards the atomizing nozzle is provided in the gap between adjacent dispersion plates.

[0010] In one embodiment of the present invention, the outer shell includes a rear end shell, a front cylinder shell, and a mounting plate. The mounting plate is disposed between the rear end shell and the front cylinder shell, and the oil pipeline passes through one end of the rear end shell and the mounting plate.

[0011] In one embodiment of this utility model, the first check valve, the second check valve, the first flow control valve, and the second flow control valve are all located inside the rear end housing.

[0012] In one embodiment of this utility model, the end face of the mounting plate located between the rear end shell and the front cylinder shell is provided with a first mounting hole that mates with the oil pipeline.

[0013] In one embodiment of this utility model, the end face of the mounting plate located between the rear end shell and the front cylinder shell is provided with a second mounting hole for mounting with an electronic ignition needle.

[0014] The beneficial effects of this utility model are as follows: The ignition structure for a pulverized coal hot blast stove, obtained through the above design, involves premixing high-pressure gas from the gas supply pipe with oil before spraying it from an atomizing nozzle and igniting it with an electronic ignition needle. This design enhances the premixing effect of the oil and gas, resulting in more thorough mixing of the oil particles sprayed from the atomizing nozzle with the gas, leading to more complete combustion and improved combustion efficiency. The first and second flow control valves are used to control the flow rate of oil and gas, ensuring that the oil and gas are mixed in a better ratio before being sprayed and burned. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the ignition structure of the pulverized coal hot blast stove provided in this embodiment of the utility model; Figure 2 A schematic diagram of the internal structure of the ignition structure of the pulverized coal hot blast stove provided for an embodiment of this utility model; Figure 3 A schematic diagram of the internal structure of the outer shell provided for an embodiment of this utility model; Figure 4 A schematic diagram of the internal structure of the spherical shell, the dispersing component, and the atomizing nozzle provided for an embodiment of this utility model.

[0017] In the diagram: 10-Outer shell; 110-Rear end shell; 120-Front cylinder shell; 130-Mounting plate; 140-First mounting hole; 150-Second mounting hole; 20-Oil-gas mixing and conveying assembly; 210-Oil pipe; 220-Gas pipe; 230-Atomizing nozzle; 240-First check valve; 250-Second check valve; 260-First flow control valve; 270-Second flow control valve; 280-Spherical shell; 290-Dispersing component; 291-Dispersing plate; 292-Guide plate; 30-Electronic ignition needle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Example Please see Figures 1-4 This utility model provides an ignition structure for a pulverized coal hot air furnace, including an outer shell 10, an oil-gas mixing and conveying assembly 20, and an electronic ignition needle 30.

[0020] The main body of the oil-gas mixing and delivery component 20 and the electronic ignition needle 30 is installed inside the outer casing 10. The oil-gas mixing and delivery component 20 uniformly premixes the oil and air, resulting in a more efficient combustion.

[0021] The oil-gas mixing and conveying assembly 20 includes an oil pipe 210, a gas pipe 220, and an atomizing nozzle 230. One end of the oil pipe 210 passes through the rear end housing 110, and the atomizing nozzle 230 is installed at the end of the oil pipe 210. One end of the gas pipe 220 passes through the rear end housing 110 and is connected to the oil pipe 210. A first flow control valve 260 and a first check valve 240 are sequentially installed along the feeding direction of the oil pipe 210, and a second flow control valve 270 and a second check valve 250 are sequentially installed along the feeding direction of the gas pipe 220. An electronic ignition needle 30 is installed inside the rear end housing 110 near the atomizing nozzle 230.

[0022] High-pressure oil is introduced through the oil supply pipe 210, and high-pressure gas from the gas supply pipe 220 is premixed with the oil before being sprayed from the atomizing nozzle 230 and ignited by the electronic ignition needle 30. This design improves the premixing effect of the oil and gas, resulting in more thorough mixing of the oil particles sprayed from the atomizing nozzle 230 with the gas, leading to more complete combustion and improved combustion efficiency. The first one-way valve 240 and the second one-way valve 250 are designed to prevent high-pressure oil from flowing back into the gas supply pipe 220 or high-pressure gas from flowing back into the oil supply pipe 210. The first flow control valve 260 and the second flow control valve 270 are used to control the flow rate of the oil and gas, allowing them to mix in a better ratio before being sprayed and burned.

[0023] In the above specific embodiment, a spherical shell 280 is provided at one end of the oil supply pipe 210 near the atomizing nozzle 230, and a dispersing element 290 is provided inside the spherical shell 280. The dispersing element 290 includes dispersing plates 291, and multiple sets of dispersing plates 291 are fixedly arranged in a ring array inside the spherical shell 280, with gaps between adjacent dispersing plates 291. A guide plate 292 that expands and tilts towards the atomizing nozzle 230 is provided in the gap between adjacent dispersing plates 291. The dispersing plates 291 inside the spherical shell 280 are used to disperse the oil and gas in the first stage to complete the oil-gas mixing, and the guide plate 292 is provided to disperse the oil a second time, so that the oil and gas complete a second impact mixing. The mixed oil and gas are finally sprayed out from the atomizing nozzle 230, which can further improve the premixing effect of oil and gas.

[0024] In its specific configuration, the outer casing 10 includes a rear end casing 110, a front cylinder casing 120, and a mounting plate 130. The mounting plate 130 is positioned between the rear end casing 110 and the front cylinder casing 120, through which the oil supply pipe 210 passes, passing over one end of the rear end casing 110 and the mounting plate 130. The first check valve 240, the second check valve 250, the first flow control valve 260, and the second flow control valve 270 are all located inside the rear end casing 110. The rear end casing 110 provides protection for the first check valve 240, the second check valve 250, the first flow control valve 260, and the second flow control valve 270.

[0025] Furthermore, the mounting plate 130 located between the rear end housing 110 and the front cylinder housing 120 has a first mounting hole 140 that mates with the oil pipe 210 on its end face. The mounting plate 130 located between the rear end housing 110 and the front cylinder housing 120 has a second mounting hole 150 that mates with the electronic ignition needle 30 on its end face.

[0026] It should be noted that the specific models and specifications of the first one-way valve 240, the second one-way valve 250, the first flow control valve 260, the second flow control valve 270, and the electronic ignition needle 30 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts existing technology in this field, and therefore will not be described in detail. The power supply and principle of the first one-way valve 240, the second one-way valve 250, the first flow control valve 260, the second flow control valve 270, and the electronic ignition needle 30 are clear to those skilled in the art, and will not be described in detail here.

[0027] The working principle of the ignition structure of this pulverized coal hot blast stove is as follows: During operation, high-pressure oil is input through the oil supply pipe 210, and high-pressure gas from the gas supply pipe 220 is premixed with the oil before being sprayed from the atomizing nozzle 230 and ignited by the electronic ignition needle 30. This design improves the premixing effect of the oil and gas, resulting in more thorough mixing of the oil particles sprayed from the atomizing nozzle 230 with the gas, leading to more complete combustion and improved combustion efficiency. The first one-way valve 240 and the second one-way valve 250 prevent high-pressure oil from flowing back into the gas supply pipe 220 or high-pressure gas from flowing back into the oil supply pipe 210. The first flow control valve 260 and the second flow control valve 270 control the flow rate of the oil and gas, ensuring a better ratio of mixing before combustion.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ignition structure for a pulverized coal hot blast stove, characterized in that, include The outer casing (10) and the oil-gas mixing and conveying assembly (20) include an oil pipe (210), a gas pipe (220) and an atomizing nozzle (230). One end of the oil pipe (210) is installed inside the rear end casing (110), and the atomizing nozzle (230) is installed at the end of the oil pipe (210). One end of the gas pipe (220) is installed through the rear end casing (110) and connected to the oil pipe (210). A first flow control valve (260) and a first check valve (240) are installed sequentially along the feeding direction of the oil pipe (210). A second flow control valve (270) and a second check valve (250) are installed sequentially along the feeding direction of the gas pipe (220). An electronic ignition needle (30) is installed inside the rear housing (110) near the atomizing nozzle (230).

2. The ignition structure of a pulverized coal hot blast stove according to claim 1, characterized in that, The oil supply pipe (210) is provided with a connected spherical shell (280) at one end near the atomizing nozzle (230), and a dispersing element (290) is provided inside the spherical shell (280).

3. The ignition structure of a pulverized coal hot blast stove according to claim 2, characterized in that, The dispersing component (290) includes a dispersing plate (291), and multiple sets of the dispersing plates (291) are fixedly arranged in a ring array inside the spherical shell (280), with gaps between adjacent dispersing plates (291).

4. The ignition structure of a pulverized coal hot blast stove according to claim 3, characterized in that, A guide plate (292) that expands and tilts toward the atomizing nozzle (230) is provided in the gap between adjacent dispersion plates (291).

5. The ignition structure of a pulverized coal hot blast stove according to claim 1, characterized in that, The outer shell (10) includes a rear end shell (110), a front cylinder shell (120) and a mounting plate (130). The mounting plate (130) is disposed between the rear end shell (110) and the front cylinder shell (120). The oil pipe (210) passes through one end of the rear end shell (110) and the mounting plate (130).

6. The ignition structure of a pulverized coal hot blast stove according to claim 5, characterized in that, The first check valve (240), the second check valve (250), the first flow control valve (260), and the second flow control valve (270) are all located inside the rear housing (110).

7. The ignition structure of a pulverized coal hot blast stove according to claim 5, characterized in that, The mounting plate (130) located between the rear end shell (110) and the front cylinder shell (120) has a first mounting hole (140) that mates with the oil pipe (210).

8. The ignition structure of a pulverized coal hot blast stove according to claim 5, characterized in that, The mounting plate (130) located between the rear end shell (110) and the front cylinder shell (120) has a second mounting hole (150) on its end face that is used to install the electronic ignition needle (30).

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