A boiler plasma ignition device

Abstract

The utility model discloses a kind of boiler plasma ignition device, belong to plasma ignition device technical field, including conveying pipeline, plasma generator, combustion chamber and injection assembly, plasma generator is installed in conveying pipeline one side, injection assembly is installed in the front end of combustion chamber, the rear end of combustion chamber is communicated conveying pipeline, the output end of plasma generator is equipped with thin tube, thin tube inserts into conveying pipeline, fuel particle is conveyed in conveying pipeline, flame gas flow enters into injection pipe, in turn through first cone pipe, second arc pipe and third cone pipe, first through first cone pipe, flame gas flow is compressed, flow rate increases, after passing through second arc pipe, form stable high-speed flame gas flow, then enter third cone pipe, flame gas flow volume increases, flow rate reduces, and impact on regulator, form scattering effect, so that internal insufficient combustion or less contact oxygen fuel particles can be fully combusted, form greater airflow flame.

Description

Technical Field

[0001] This utility model belongs to the technical field of plasma ignition devices, specifically a boiler plasma ignition device. Background Technology

[0002] In modern industrial production and energy supply systems, boilers are key pieces of equipment, and their efficient and stable operation is crucial. Boiler plasma ignition technology has emerged to address this need, aiming to start boilers in a clean and efficient manner, reducing the high costs and environmental pollution associated with traditional oil ignition. By emitting a high-temperature plasma jet through a plasma generator, it directly ignites primary air and pulverized coal, achieving cold air ignition and significantly revolutionizing ignition methods.

[0003] However, in practical applications, plasma ignition encounters the thorny problem of incomplete combustion. Fluctuations in coal quality are a major contributing factor. Coal from different mines and batches exhibits significant differences in key indicators such as volatile matter, calorific value, and moisture content. Low-volatile coal or inferior bituminous coal is difficult to ignite rapidly and completely by plasma. Regarding equipment, if the plasma generator is unstable, experiencing arc interruptions, the localized high-temperature environment cannot be maintained, forcing the coal powder combustion process to stop. An unreasonable burner design, such as turbulent internal airflow, insufficient contact and uneven mixing between coal powder and high-temperature plasma, will also hinder efficient combustion. Furthermore, if operating parameters are not precisely controlled, such as primary air velocity and coal powder concentration deviating from the optimal range, it will also lead to incomplete combustion, energy waste, increased carbon content in fly ash, and even safety hazards such as furnace deflagration. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] This utility model discloses a boiler plasma ignition device, comprising a conveying pipe, a plasma generator, a combustion chamber, and an injection assembly. The plasma generator is installed on one side of the conveying pipe, the injection assembly is installed at the front end of the combustion chamber, and the rear end of the combustion chamber is connected to the conveying pipe. The output end of the plasma generator is provided with a thin tube, which is inserted into the conveying pipe to convey fuel particles. A fuel injection mechanism is provided above the combustion chamber to inject fuel into the combustion chamber. The injection assembly includes a nozzle and an regulator. The nozzle is connected to the combustion chamber, and the regulator is installed inside the nozzle.

[0007] Preferably, the nozzle includes a first conical tube, a second arc tube, a third conical tube, and reinforcing ribs. The two ends of the second arc tube are respectively connected to the first conical tube and the third conical tube. The outer walls of the first conical tube, the second arc tube, and the third conical tube are provided with reinforcing ribs.

[0008] Preferably, the first tapered tube includes a first front open end and a first rear open end, the inner diameter of the first rear open end is smaller than the inner diameter of the first front open end, and the first rear open end is connected to the second arc tube.

[0009] Preferably, the third tapered tube includes a third front open end and a third rear open end, the inner diameter of the third rear open end is smaller than the inner diameter of the third front open end, the third rear open end is connected to the second arc tube, and the inner diameter of the third front open end is larger than the inner diameter of the first front open end.

[0010] Preferably, the regulator has a structure with pointed ends, and the middle part of the regulator is connected to the inner wall of the third tapered tube through a connecting rod. The regulator is coaxial with the third tapered tube.

[0011] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0012] This utility model discloses a boiler plasma ignition device. The flame gas flow enters the nozzle and passes through the first cone tube, the second arc tube, and the third cone tube in sequence. When passing through the first cone tube, the flame gas flow is compressed and the flow velocity increases. Then, it passes through the second arc tube to form a stable high-speed flame gas flow. After entering the third cone tube, the volume of the flame gas flow increases and the flow velocity decreases. It then impacts the regulator, forming a scattering effect. This allows fuel particles that are not fully combusted or have little contact with oxygen to be fully combusted, forming a larger gas flow flame. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the overall structure of a boiler plasma ignition device according to the present invention;

[0014] Figure 2 is a schematic diagram of the jet assembly of a boiler plasma ignition device according to this utility model.

[0015] Explanation of the labels in the diagram: 100, conveying pipeline;

[0016] 200. Plasma generator;

[0017] 210. Thin tube; 300. Combustion chamber;

[0018] 310. Fuel injection mechanism;

[0019] 400. Injection assembly; 410. Nozzle; 411. First cone tube; 412. Second arc tube; 413. Third cone tube; 414. Reinforcing rib; 420. Regulator. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper", "lower", "left", "right", "front", and "rear" are used.

[0023] The terms “top,” “bottom,” “inner,” “outer,” “middle,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Referring to Figures 1-2, a boiler plasma ignition device according to this embodiment includes a conveying pipe 100, a plasma generator 200, a combustion chamber 300, and an injection assembly 400. The plasma generator 200 is installed on one side of the conveying pipe 100. The injection assembly 400 is installed at the front end of the combustion chamber 300, and the rear end of the combustion chamber 300 is connected to the conveying pipe 100. A thin tube 210 is provided at the output end of the plasma generator 200. The thin tube 210 is inserted into the conveying pipe 100, and fuel particles are conveyed in the conveying pipe 100. A fuel injection mechanism 310 is provided above the combustion chamber 300. The fuel injection mechanism 310 injects fuel into the combustion chamber 300. The injection assembly 400 includes a nozzle 410 and a regulator 420. The nozzle 410 is connected to the combustion chamber 300, and the regulator 420 is installed in the nozzle 410.

[0028] The nozzle 410 of this embodiment includes a first conical tube 411, a second arc tube 412, a third conical tube 413, and a reinforcing rib plate 414. The two ends of the second arc tube 412 are respectively connected to the first conical tube 411 and the third conical tube 413. The outer walls of the first conical tube 411, the second arc tube 412, and the third conical tube are provided with reinforcing rib plates 414.

[0029] The first tapered tube 411 in this embodiment includes a first front open end and a first rear open end. The inner diameter of the first rear open end is smaller than the inner diameter of the first front open end. The first rear end is connected to the second arc tube 412.

[0030] The third tapered tube 413 in this embodiment includes a third front open end and a third rear open end. The inner diameter of the third rear open end is smaller than the inner diameter of the third front open end. The third rear open end is connected to the second arc tube 412. The inner diameter of the third front open end is larger than the inner diameter of the first front open end.

[0031] In this embodiment, the regulator 420 has a structure with pointed ends. The middle part of the regulator 420 is connected to the inner wall of the third tapered tube 413 through a connecting rod. The regulator 420 and the third tapered tube 413 are coaxial.

[0032] Working principle: Fuel particle gas flow is conveyed in the delivery pipe 100. At the same time, the plasma generator 200 generates plasma gas flow and delivers it to the delivery pipe 100 through the thin pipe 210. The plasma gas flow mixes with the fuel particle gas flow and is then injected into the combustion chamber 300. Fuel is injected into the combustion chamber 300 and ignites upon contact with the high-temperature plasma gas flow. The plasma gas flow ignites the fuel particles together to form a high-temperature and powerful flame gas flow. The flame gas flow enters the nozzle 410 and passes through the first cone pipe 411, the second arc pipe 412, and the third cone pipe 413 in sequence. When it first passes through the first cone pipe 411, the flame gas flow is compressed and the flow velocity increases. Then, it forms a stable high-speed flame gas flow after passing through the second arc pipe 412. After entering the third cone pipe 413, the volume of the flame gas flow increases and the flow velocity decreases. It then impacts the regulator 420, creating a scattering effect. This allows fuel particles that are not fully combusted or have little contact with oxygen to be fully combusted, forming a larger gas flow flame.

[0033] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A boiler plasma ignition device, characterized in that: The system includes a delivery pipe (100), a plasma generator (200), a combustion chamber (300), and an injection assembly (400). The plasma generator (200) is installed on one side of the delivery pipe (100). The injection assembly (400) is installed at the front end of the combustion chamber (300), and the rear end of the combustion chamber (300) is connected to the delivery pipe (100). A thin tube (210) is provided at the output end of the plasma generator (200), and the thin tube (210) is inserted into the delivery pipe (100) to deliver fuel particles. A fuel injection mechanism (310) is provided above the combustion chamber (300). The mechanism (310) injects fuel into the combustion chamber (300). The injection assembly (400) includes a nozzle (410) and an adjuster (420). The nozzle (410) is connected to the combustion chamber (300). The adjuster (420) is installed inside the nozzle (410). The nozzle (410) includes a first conical tube (411), a second arc tube (412), a third conical tube (413), and a reinforcing rib (414). The two ends of the second arc tube (412) are respectively connected to the first conical tube (411) and the third conical tube (413). The outer walls of the first conical tube (411), the second arc tube (412), and the third conical tube are provided with reinforcing ribs (414).

2. The boiler plasma ignition device according to claim 1, characterized in that: The first tapered tube (411) includes a first front open end and a first rear open end. The inner diameter of the first rear open end is smaller than the inner diameter of the first front open end. The first rear open end is connected to the second arc tube (412).

3. The boiler plasma ignition device according to claim 1, characterized in that: The third tapered tube (413) includes a third front open end and a third rear open end. The inner diameter of the third rear open end is smaller than the inner diameter of the third front open end. The third rear open end is connected to the second arc tube (412). The inner diameter of the third front open end is larger than the inner diameter of the first front open end.

4. The boiler plasma ignition device according to claim 1, characterized in that: The regulator (420) has a structure with pointed ends. The middle part of the regulator (420) is connected to the inner wall of the third tapered tube (413) through a connecting rod. The regulator (420) and the third tapered tube (413) are coaxial.

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