Fuel nozzle assembly and combustion device

Abstract

The present invention provides a fuel nozzle assembly and a combustion device. The fuel nozzle assembly includes a fuel pipe, an atomizer pipe and a Brown's gas pipe. The end of the atomizer pipe is arranged in the fuel pipe, and the end of the Brown's gas pipe is arranged in the fuel pipe. By applying the technical solution of the present invention, since the end of the atomizer pipe and the end of the Brown's gas pipe are arranged in the fuel pipe, the end of the fuel pipe can spray out a more evenly mixed atomized fuel, so that the atomized fuel is evenly mixed and fully catalyzed by the Brown's gas, and the best mixed catalytic combustion effect is achieved. Among them, the atomizer helps to atomize heavy oil liquid fuel, so that it burns more fully; and the Brown's gas has good catalytic combustion and stabilizing effects, and has a better mixed catalytic combustion effect on heavy fuels such as heavy oil and asphalt.

Description

Technical Field

[0001] The present invention relates to the field of combustion technology, and in particular to a fuel nozzle assembly and a combustion device. Background Art

[0002] At present, my country is still in the context of rapid development, with huge energy demand, and my country's energy structure is characterized by "rich in coal, poor in oil, and little gas", and the prices of high-quality fuel oil and natural gas are rising; at the same time, the stock of organic matter with high calorific value, high molecular weight, high viscosity, and difficult to burn stably is increasing. Therefore, more and more industries are beginning to pay attention to using such organic matter as fuel to replace power fuel.

[0003] Heavy oil fuel is a very special fossil fuel: compared with coal, it burns cleanly and has a high calorific value; compared with light oil, it is economical and cheap; compared with natural gas, it is safe, easy to store, and not restricted by geographical location. At the same time, there are some difficult to solve problems in the combustion of heavy oil fuel: difficult ignition, unstable combustion; easy carbon deposition during the combustion process; SO2, NO X , particulate matter and other pollution emissions seriously exceed the standard. In this context, it is of great practical significance and economic benefit to explore and study the combustion technology of heavy oil fuels and solve the above-mentioned problems.

[0004] The existing technologies for solving this type of fuel in industrial furnaces are mostly to add chemical additives during atomization combustion. The additives are generally composed of a variety of reagents. For example, it is shown in the public patent CN101845339B that the additives for heavy oil combustion are composed of solvent oil, anionic surfactants, combustion aids, thermal stabilizers, chemical stabilizers, etc. The process and operation of this technology are relatively complicated, and the addition of chemical additives has a greater negative impact on fuel combustion and its tail gas emissions; there is also a technology that uses Brown's gas for catalytic combustion. For example, it is shown in the public patent CN111336528A that the ignition device cooperates with the Brown's gas ignition burner to first ignite the Brown's gas, and then use the ignited Brown's gas flame to ignite the fuel. In this method, the Brown's gas is an independent combustion method and is not evenly mixed with the fuel. The catalytic effect of the Brown's gas is difficult to fully exert, so the combustion of heavy oil fuel is still not sufficient, and this method also has the problem of easy flashback of the Brown's gas. Summary of the invention

[0005] The main purpose of the present invention is to provide a fuel nozzle assembly and a combustion device to solve the technical problem of incomplete combustion of fuels similar to heavy oil in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a fuel nozzle assembly, including: a fuel pipe, the head end of the fuel pipe is used to receive fuel; an atomizer pipe, the head end of the atomizer pipe is used to receive atomizer, and the end of the atomizer pipe is arranged in the fuel pipe; a Brown's gas pipe, the head end of the Brown's gas pipe is used to receive Brown's gas, and the end of the Brown's gas pipe is arranged in the fuel pipe; the atomizer and Brown's gas are mixed with the fuel in the fuel pipe, and the mixed atomized fuel is sprayed out from the end of the fuel pipe.

[0007] In one embodiment, the atomizer tube is disposed inside the fuel tube along the length direction of the fuel tube, and the end of the atomizer tube is located at the end position of the fuel tube.

[0008] In one embodiment, the head end of the atomizer tube passes through the head end of the fuel tube.

[0009] In one embodiment, the Brownian air tube is disposed in the atomizer tube, and the head end of the Brownian air tube passes through the head end of the atomizer tube.

[0010] In one embodiment, the end of the Brown gas pipe is remote from the end of the fuel pipe.

[0011] In one embodiment, a constriction is formed at the end of the atomizer tube, and a bell mouth is formed at the end of the Brownian air tube.

[0012] In one embodiment, the fuel nozzle assembly further includes an air tube, a head end of the air tube is used to receive air, the fuel tube is installed in the air tube, and a terminal end of the fuel tube is located at a terminal end of the air tube.

[0013] In one embodiment, the fuel nozzle assembly also includes a nozzle, an air pipe is installed in the nozzle, the head end of the nozzle is used to receive air, and the tail end of the nozzle is used to spray burning fuel, the air received by the head end of the air pipe enters the head end of the air pipe and the nozzle respectively, and the air entering the nozzle is mixed with the mixed gas sprayed from the tail end of the air pipe at the tail end of the nozzle.

[0014] In one embodiment, the fuel nozzle assembly further includes an igniter installed in the nozzle pipe, and an ignition end of the igniter is located at the end of the air pipe.

[0015] The present application also provides a combustion device, including a fuel nozzle assembly, and the fuel nozzle assembly is the above-mentioned fuel nozzle assembly.

[0016] By applying the technical solution of the present invention, since the end of the atomizer pipe and the end of the Brown gas pipe are arranged in the fuel pipe, the end of the fuel pipe can spray out a more evenly mixed atomized fuel, so that the atomized fuel is evenly mixed and fully catalyzed by the Brown gas, and the best mixed catalytic combustion effect is achieved. Among them, the atomizer helps to atomize the heavy oil liquid fuel, so that it burns more fully; and the Brown gas has good catalytic combustion and stabilizing effects, and has a better mixed catalytic combustion effect on heavy fuels such as heavy oil and asphalt.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 FIG. 1 is a schematic diagram showing the overall structure of an embodiment of a fuel nozzle assembly according to the present invention. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] In order to solve the problem in the prior art that liquid fuels similar to heavy oil have high calorific value, high molecular weight, high viscosity, but are difficult to burn stably and have excessive smoke emissions, the technical solution of the present invention provides a fuel nozzle assembly to improve the combustion stability and combustion completeness of the above liquid fuels.

[0025] Figure 1 The embodiment of the fuel nozzle assembly of the present invention is shown, and the fuel nozzle assembly includes a fuel pipe 10, an atomizer pipe 20 and a Brown's gas pipe 30, wherein the head end of the fuel pipe 10 is used to receive fuel, the head end of the atomizer pipe 20 is used to receive the atomizer, and the tail end of the atomizer pipe 20 is arranged in the fuel pipe 10. The head end of the Brown's gas pipe 30 is used to receive the Brown's gas, and the tail end of the Brown's gas pipe 30 is arranged in the fuel pipe 10. When in use, the atomizer and the Brown's gas are mixed with the fuel in the fuel pipe 10, and the mixed atomized fuel is sprayed out from the tail end of the fuel pipe 10.

[0026] By applying the technical solution of the present invention, since the end of the atomizer tube 20 and the end of the Brownian gas tube 30 are arranged in the fuel tube 10, the atomizer and Brownian gas sprayed from the atomizer tube 20 and the Brownian gas tube 30 are mixed with the fuel in the fuel tube 10, so that the end of the fuel tube 10 can spray out a more evenly mixed atomized fuel, so that the atomized fuel is evenly mixed and fully catalyzed by the Brownian gas, and the best mixed catalytic combustion effect is achieved. Among them, the atomizer helps to atomize the heavy oil liquid fuel, so that it burns more fully; and the Brownian gas has good catalytic combustion and stabilizing effects, and has a better mixed catalytic combustion effect on heavy fuels such as heavy oil and asphalt.

[0027] Optionally, in the technical solution of this embodiment, the fuel can be any liquid fuel, including, in addition to conventional diesel and light oil, liquid fuels such as residual oil, heavy oil, asphalt, etc. with high calorific value, high molecular weight, and high viscosity.

[0028] Preferably, Figure 1As shown, in the technical solution of this embodiment, the atomizer tube 20 is arranged in the fuel pipe 10 along the length direction of the fuel pipe 10, and the end of the atomizer tube 20 is located at the end position of the fuel pipe 10. Since the end of the atomizer tube 20 is located at the end position of the fuel pipe 10, the atomization effect of the fuel can be ensured. Generally, for heavy oil liquid fuel, the atomizer will use a high-temperature medium. Therefore, the atomizer tube 20 is arranged in the fuel pipe 10 along the length direction of the fuel pipe 10. The fuel in the fuel pipe 10 can be preheated by the heat transferred by the atomizer tube 20 itself, thereby helping the fuel to be atomized and distributed more evenly. Optionally, a medium such as compressed air or steam can be used as an atomizer to provide a medium and power for fuel injection atomization. At the same time, the atomizer also carries the optimal ratio of Brown's gas required for mixed catalytic combustion to be fully mixed with the fuel in the fuel pipe 10. As an optional implementation, in the technical solution of this embodiment, the head end of the atomizer tube 20 passes through the head end of the fuel pipe 10.

[0029] Preferably, in the technical solution of this embodiment, a nozzle is provided at the end of the fuel pipe 10, which helps to spray the fuel, atomizer and Brownian gas more evenly, thereby facilitating combustion.

[0030] Preferably, in the technical solution of the present embodiment, the Brown gas pipe 30 is arranged in the atomizer pipe 20, and the head end of the Brown gas pipe 30 passes through the head end of the atomizer pipe 20. Brown gas is sprayed out together with the atomizer, enters the fuel pipe 10 and mixes with the fuel. By arranging the Brown gas pipe 30 in the atomizer pipe 20, the Brown gas involved in the atomizer will not burn in the Brown gas pipe 30, will not backfire, and there is no safety hazard. More preferably, in the technical solution of the present embodiment, the end of the Brown gas pipe 30 is far away from the end of the fuel pipe 10. In this way, it can be ensured that the end of the Brown gas pipe 30 is a certain length away from the end position of the fuel pipe 10, further improving the reliability of not backfire and improving the safety factor of the fuel nozzle assembly. More preferably, in the technical solution of the present embodiment, a constriction is formed at the end of the atomizer pipe 20, which helps the atomizer sprayed from the atomizer pipe 20 to fully atomize the fuel.

[0031] Optionally, in the technical solution of this embodiment, the Brown's gas pipe 30 is used to pass the Brown's gas, which is an active hydrogen-oxygen mixed gas generated by electrolysis of a special device, into the atomizer. More preferably, the end of the Brown's gas pipe 30 is in a bell-shaped shape to ensure that the Brown's gas smoothly enters the atomizer tube and moves forward with the atomizer.

[0032] like Figure 1As shown, in the technical solution of the present embodiment, the fuel nozzle assembly also includes an air pipe 40, the head end of the air pipe 40 is used to receive air, the fuel pipe 10 is installed in the air pipe 40, and the end of the fuel pipe 10 is located at the end of the air pipe 40. In this way, the air, atomizer, Brown's gas and fuel can be fully mixed at the end of the air pipe 40. It should be noted that in the technical solution of the present embodiment, through the above-mentioned nested structural design, the air, atomizer, Brown's gas and fuel can be fully mixed during the output process, so that the fuel can burn more stably and more fully. Optionally, the head end of the fuel pipe 10 passes through the head end of the air pipe 40.

[0033] Optionally, in the technical solution of this embodiment, the fuel nozzle assembly also includes a nozzle 50, the air pipe 40 is installed in the nozzle 50, the head end of the nozzle 50 is used to receive air, and the tail end of the nozzle 50 is used to spray the fuel for combustion. The air received by the head end of the air pipe 40 enters the head end of the air pipe 40 and the nozzle 50 respectively, and the air entering the nozzle 50 is mixed with the mixed gas sprayed from the tail end of the air pipe 40 at the tail end of the nozzle 50. The nozzle 50 is used to receive Brown's gas, atomizer, fuel and air from different pipelines, and provide the required space for atomization injection, ignition and mixed catalytic combustion. The nozzle 50 is also used to spray the flame to the place of use. In the technical solution of this embodiment, on the one hand, the air entering the air pipe 40 can provide kinetic energy to the atomizer, Brown's gas and fuel, so that they are more fully mixed, and on the other hand, the nozzle 50 can also provide sufficient air for combustion, provide secondary air for its combustion, and make the combustion more stable and sufficient.

[0034] Preferably, Figure 1 As shown, in the technical solution of this embodiment, the fuel nozzle assembly further includes an igniter 60, which is installed in the nozzle 50, and the igniter end of the igniter 60 is located at the end of the air pipe 40. By operating the igniter 60, the igniter end of the igniter 60 can ignite the atomized fuel fully mixed with the Brownian gas.

[0035] Specifically, the technical solution of this embodiment is applied, and the Brown's gas pipe 30 is inserted into the atomizer pipe 20. As the atomizer enters the fuel pipe 10, it is mixed with the fuel and sprayed from the nozzle into the nozzle 50, and is ignited by the igniter 60 under the support of air, and then mixed catalytic combustion is performed. The fuel is fully mixed with the Brown's gas during atomization, and the catalytic effect of the Brown's gas is maximized.

[0036] It should be noted that when no atomizing medium is used, mechanical atomization can also be used. In this embodiment, a mechanical atomizing device is used to replace the atomizer tube 20, which should also fall within the scope of protection of this application.

[0037] The present invention also provides a combustion device, which includes the above-mentioned fuel nozzle assembly. The use of the above-mentioned fuel nozzle assembly can improve the combustion efficiency of the combustion device, making the combustion more stable and more complete.

[0038] From the above content, it can be seen that the technical solution of the present invention allows Brown's gas and fuel to be directly mixed evenly before combustion. It ensures that the mixed catalytic combustion-supporting and combustion-stabilizing effects of Brown's gas in the mixed catalytic combustion process can be brought into play to the greatest extent; the combustion stability of the fuel in the mixed catalytic combustion process is better, the catalytic speed is faster, the combustion intensity is greater, and the environmental protection performance is better; only Brown's gas is substituted, the operation is simple, no pollution source is introduced, and there is no secondary pollution; and the flashback of Brown's gas can be completely eliminated. It is a simple, reasonable, safe and reliable, environmentally friendly, and technically and economically excellent advanced process method. The technical solution of the present invention effectively solves the problems of complex procedures, easy flashback, and unsatisfactory catalytic effect in the combustion of heavy oil liquid fuels in the prior art. The technical solution of the present invention is safe, reliable, simple and reasonable, efficient and stable to operate, and has good economic benefits and environmental protection advantages.

[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fuel nozzle assembly, characterized in that: include: A fuel pipe (10), the head end of the fuel pipe (10) being used to receive fuel; an atomizer tube (20), the head end of the atomizer tube (20) being used to receive an atomizer, and the tail end of the atomizer tube (20) being arranged in the fuel tube (10); a Brownian gas pipe (30), wherein the head end of the Brownian gas pipe (30) is used to receive Brownian gas, and the tail end of the Brownian gas pipe (30) is arranged in the fuel pipe (10); The atomizer and the Brownian gas are mixed with the fuel in the fuel pipe (10), and the mixed atomized fuel is sprayed out from the end of the fuel pipe (10).

2. The fuel nozzle assembly according to claim 1, characterized in that The atomizer tube (20) is arranged inside the fuel tube (10) along the length direction of the fuel tube (10), and the end of the atomizer tube (20) is located at the end position of the fuel tube (10).

3. The fuel nozzle assembly according to claim 2, characterized in that The head end of the atomizer pipe (20) passes through the head end of the fuel pipe (10).

4. The fuel nozzle assembly according to claim 1, characterized in that The Brownian air tube (30) is arranged in the atomizer tube (20), and the head end of the Brownian air tube (30) passes through the head end of the atomizer tube (20).

5. The fuel nozzle assembly according to claim 4, characterized in that The end of the Brownian gas pipe (30) is far away from the end of the fuel pipe (10).

6. The fuel nozzle assembly according to claim 5, characterized in that The end of the atomizer tube (20) is formed with a constricted opening, and the end of the Brownian air tube (30) is formed with a bell mouth.

7. The fuel nozzle assembly according to claim 1, characterized in that The fuel nozzle assembly further comprises an air pipe (40), the head end of which is used to receive air, the fuel pipe (10) is installed in the air pipe (40), and the end of the fuel pipe (10) is located at the end of the air pipe (40).

8. The fuel nozzle assembly according to claim 7, characterized in that The fuel nozzle assembly also includes a nozzle (50), the air pipe (40) is installed in the nozzle (50), the head end of the nozzle (50) is used to receive air, and the tail end of the nozzle (50) is used to spray burning fuel, the air received by the head end of the air pipe (40) enters the head end of the air pipe (40) and the nozzle (50) respectively, and the air entering the nozzle (50) is mixed with the mixed gas sprayed from the tail end of the air pipe (40) at the tail end of the nozzle (50).

9. The fuel nozzle assembly according to claim 8, characterized in that The fuel nozzle assembly further comprises an igniter (60) which is installed in the nozzle (50) and an ignition end of the igniter (60) is located at the end of the air tube (40).

10. A combustion device, comprising a fuel nozzle assembly, characterized in that: The fuel nozzle assembly is the fuel nozzle assembly according to any one of claims 1 to 9.

Images