阅读说明：本技术 一种双旋流稳焰器及重油燃烧器 (Double-cyclone flame stabilizer and heavy oil burner ) 是由 周康 黄建华 王芸红 于 2019-10-24 设计创作，主要内容包括：本发明公开了一种双旋流稳焰器及重油燃烧器,双旋流稳焰器包括圆环二与圆环一同轴设置、且上端对齐,圆环二与圆环一之间通过第一旋流叶片连接,第一旋流叶片绕竖直方向与水平方向两次偏转后连接于圆环一和圆环二之间；多孔板与圆环一同轴且与圆环一的中心轴垂直设置,且多孔板在第一旋流叶片与圆环二上；圆环三与圆环一同轴设置,且圆环三的内壁固定于多孔板外周边；圆环四与圆环三同轴设置、且上端均与多孔板上端对齐,圆环四与圆环三之间通过第二旋流叶片连接；第二旋流叶片绕竖直方向与水平方向两次偏转后连接于圆环三和圆环四；圆环五同轴连接于多孔板上端面；圆环五、圆环一、圆环二、圆环三、圆环四的直径依次增大。(The invention discloses a double-cyclone flame holder and a heavy oil burner, wherein the double-cyclone flame holder comprises a second circular ring and a first circular ring which are coaxially arranged and the upper ends of which are aligned, the second circular ring is connected with the first circular ring through a first cyclone blade, and the first cyclone blade is connected between the first circular ring and the second circular ring after twice deflection around the vertical direction and the horizontal direction; the perforated plate is coaxial with the first circular ring and is vertical to the central shaft of the first circular ring, and the perforated plate is arranged on the first rotational flow blade and the second circular ring; the third ring and the first ring are coaxially arranged, and the inner wall of the third ring is fixed on the outer periphery of the porous plate; the ring IV and the ring III are coaxially arranged, the upper ends of the ring IV and the ring III are aligned with the upper end of the porous plate, and the ring IV and the ring III are connected through a second rotational flow blade; the second swirl vane is deflected twice around the vertical direction and the horizontal direction and then is connected with the third circular ring and the fourth circular ring; the five circular rings are coaxially connected to the upper end surface of the porous plate; the diameters of the ring five, the ring one, the ring two, the ring three and the ring four are increased in sequence.)

1. A double-cyclone flame stabilizer is characterized by comprising a first ring (1), a first cyclone blade (2), a second ring (3), a perforated plate (4), a third ring (5), a second cyclone blade (6), a fourth ring (7) and a fifth ring (8);

the second ring (3) and the first ring (1) are coaxially arranged, the upper ends of the second ring (3) and the first ring (1) are aligned, the second ring (3) and the first ring (1) are connected through a first rotational flow blade (2), and the first rotational flow blade (2) is connected between the first ring (1) and the second ring (3) after twice deflection in the vertical direction and the horizontal direction;

the porous plate (4) is coaxial with the first circular ring (1) and is perpendicular to the central shaft of the first circular ring (1), and the porous plate (4) is fixed on the first rotational flow blade (2) and the second circular ring (3);

the third ring (5) and the first ring (1) are coaxially arranged, and the inner wall of the third ring (5) is fixed on the outer periphery of the porous plate (4);

the ring IV (7) and the ring III (5) are coaxially arranged, the upper ends of the ring IV and the ring III are aligned to the upper end of the porous plate (4), and the ring IV (7) and the ring III (5) are connected through a second swirl vane (6); the second swirl vanes (6) are deflected twice around the vertical direction and the horizontal direction and then are connected to the third circular ring (5) and the fourth circular ring (7);

the five circular rings (8) are coaxially connected to the upper end surface of the porous plate (4);

the diameters of the five (8) ring, the first (1) ring, the second (3) ring, the third (5) ring and the fourth (7) ring are increased in sequence.

2. The dual cyclone flame holder of claim 1, wherein after the first cyclone blade (2) twice deflects around the vertical direction and the horizontal direction, one end is welded to the first ring (1), and the other end is welded to the second ring (3);

the included angle between the first cyclone blade (2) and the vertical direction is 50 ~ 75 degrees, and the included angle between the first cyclone blade (2) and the horizontal direction is 15 ~ 40 degrees.

3. A dual swirl flame holder according to claim 1, wherein the first swirl vanes (2) comprise 16 ~ 30 vanes.

4. The dual cyclone flame holder of claim 1, wherein the second cyclone blade (6) is welded at one end to the third ring (5) and at the other end to the fourth ring (7) after being deflected twice in the vertical direction and the horizontal direction;

the included angle between the second cyclone blade (6) and the vertical direction is 30 ~ 60 degrees, and the included angle between the second cyclone blade (6) and the horizontal direction is 25 ~ 40 degrees.

5. A dual swirl flame holder according to claim 1, wherein the second swirl vanes (6) comprise 16 ~ 30 vanes.

6. A dual swirl flame holder according to claim 1, wherein the second swirl vanes (6) have a smaller deflection angle around vertical and horizontal than the first swirl vanes (2).

7. The dual cyclone flame holder of claim 1, wherein the perforated plate (4) is a circular plate with a through hole at the center, and the diameter of the through hole is the same as the inner diameter of the circular ring five (8); the porous plate (4) is respectively provided with a through hole, a first small hole annular area (A-1), a big hole annular area (A-2) and a second small hole annular area (A-3) from inside to outside, a plurality of small holes are uniformly distributed in the first small hole annular area (A-1) and the second small hole annular area (A-3), and big holes are uniformly distributed in the big hole annular area (A-2); the boundary of the first small hole annular area (A-1) and the large hole annular area (A-2) is arranged at a position where the outer diameter of the first circular ring (1) is set to be outward, and is positioned between the first circular ring (1) and the second circular ring (3); the boundary of the large-hole annular region (A-2) and the second small-hole annular region (A-3) is at the outer diameter of the second ring (3).

8. The double-swirl flame holder of claim 7, wherein the perforated plate (4) is provided with a mounting hole (9) for fixing on a combustion cylinder of a heavy oil burner.

9. A dual swirl flame holder according to claim 8, wherein the mounting hole (9) is provided in the second orifice annular region (A-3).

10. A heavy oil burner, characterized by comprising the double-cyclone flame holder of any one of claims 1 to 9, which is coaxially installed in a combustion cylinder of the heavy oil burner, and organizes combustion air flow in the combustion cylinder into root wind, primary cyclone wind, leeward region supplementary wind, secondary cyclone wind and tertiary direct current wind;

the circular channel of the first circular ring (1) forms a root air channel (B-1), the annular channel between the first circular ring (1) and the second circular ring (3) forms a primary rotational flow air channel (B-2), and the annular channel between the second circular ring (3) and the third circular ring (5) forms a leeward area air supplementing channel (B-3); an annular passage between the third circular ring (5) and the fourth circular ring (7) forms a secondary rotational flow air duct (B-4); and an annular channel between the outer wall of the ring four (7) and the inner wall of the combustion cylinder forms a tertiary direct-current air channel.

Technical Field

The invention belongs to the technical field of clean combustion, and particularly relates to a double-cyclone flame stabilizer and a heavy oil combustor.

Background

The heavy oil is used as a relatively low-price liquid fuel, the price of the heavy oil is greatly lower than that of light oil, natural gas and other fuels, the combustion environmental protection performance of the heavy oil has obvious advantages compared with that of pulverized coal, coal water slurry and other fuels, and the heavy oil is heated by utilizing the heat generated by the combustion of the heavy oil and is widely applied to large-scale power stations, boilers and road building maintenance equipment. The flame stabilizer is one of important components of a heavy oil-fired burner, and has the function of forming a stable ignition region in a combustion chamber and enhancing oil-gas mixing so as to promote the full combustion of fuel.

Most of flame stabilizers for organizing air flow in the existing combustion process are flat-plate type or conical flame stabilizers with tangential grooves, and the problems of insufficient combustion such as carbon deposition, coking, black smoke emission, high CO content in smoke and the like easily occur in the heavy oil combustion process without good air flow organization. In addition, because heavy oil has high viscosity and long flame, and is not in accordance with the requirement that some equipment requires the compact size of a hearth, the overlong flame can cause oil drops to impact on the hearth or other working media, further worsen combustion and even pollute the working media.

Disclosure of Invention

The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a double-cyclone flame stabilizer and a heavy oil burner.

The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:

in a first aspect, a double-cyclone flame stabilizer is provided, which comprises a first ring, a first cyclone blade, a second ring, a porous plate, a third ring, a second cyclone blade, a fourth ring and a fifth ring;

the second circular ring and the first circular ring are coaxially arranged and the upper ends of the second circular ring and the first circular ring are aligned, the second circular ring and the first circular ring are connected through a first rotational flow blade, and the first rotational flow blade is connected between the first circular ring and the second circular ring after twice deflection around the vertical direction and the horizontal direction;

the perforated plate is coaxial with the first circular ring and is perpendicular to the central shaft of the first circular ring, and the perforated plate is fixed on the first rotational flow blade and the second circular ring;

the third ring and the first ring are coaxially arranged, and the inner wall of the third ring is fixed on the outer periphery of the porous plate;

the ring IV and the ring III are coaxially arranged, the upper ends of the ring IV and the ring III are aligned with the upper end of the porous plate, and the ring IV and the ring III are connected through a second rotational flow blade; the second swirl vanes are deflected twice around the vertical direction and the horizontal direction and then are connected to the third circular ring and the fourth circular ring;

the five circular rings are coaxially connected to the upper end surface of the porous plate;

the diameters of the fifth ring, the first ring, the second ring, the third ring and the fourth ring are increased in sequence.

In some embodiments, after the first swirl vane deflects twice around the vertical direction and the horizontal direction, one end of the first swirl vane is welded to the first ring, and the other end of the first swirl vane is welded to the second ring;

the included angle between the first cyclone blade and the vertical direction is 50 ~ 75 degrees, and the included angle between the first cyclone blade and the horizontal direction is 15 ~ 40 degrees.

Further, the first swirl vanes include 16 ~ 30 vanes.

In some embodiments, after the second swirl vanes are deflected twice around the vertical direction and the horizontal direction, one end of each second swirl vane is welded to the third ring, and the other end of each second swirl vane is welded to the fourth ring;

the included angle between the second cyclone blade and the vertical direction is 30 ~ 60 degrees, and the included angle between the second cyclone blade and the horizontal direction is 25 ~ 40 degrees.

Further, the second swirl vanes include 16 ~ 30 vanes.

In some embodiments, the second swirl vane has a smaller angle of deflection about both the vertical and horizontal directions than the first swirl vane.

In some embodiments, the perforated plate is a circular plate with a through hole at the center, and the diameter of the through hole is the same as the inner diameter of the circular plate; the porous plate is respectively provided with a through hole, a first small hole annular area, a big hole annular area and a second small hole annular area from inside to outside, a plurality of small holes are uniformly distributed in the first small hole annular area and the second small hole annular area, and big holes are uniformly distributed in the big hole annular area; the boundary of the first small hole annular area and the large hole annular area is located at a position where the outer diameter of the first circular ring is set to be outward, and is located between the first circular ring and the second circular ring; the boundary between the large hole annular region and the second small hole annular region is at the second outer diameter of the circular ring.

In some embodiments, the perforated plate is provided with a mounting hole for fixing on a combustion cylinder of the heavy oil burner. Further, the mounting hole is disposed in the second small hole annular region.

The invention also provides a heavy oil burner, which comprises the double-cyclone flame holder, wherein the double-cyclone flame holder is coaxially arranged in a combustion cylinder of the heavy oil burner and organizes combustion air flow in the combustion cylinder into root air, primary cyclone air, lee area supplementary air, secondary cyclone air and tertiary direct current air;

the circular channel of the first circular ring forms a root air channel, the annular channel between the first circular ring and the second circular ring forms a primary rotational flow air channel, and the annular channel between the second circular ring and the third circular ring forms a leeward area air supplementing channel; an annular channel between the third circular ring and the fourth circular ring forms a secondary rotational flow air channel; and an annular channel between the outer wall of the ring IV and the inner wall of the combustion cylinder forms a tertiary direct-current air channel.

Has the advantages that: the double-cyclone flame holder and the heavy oil burner provided by the invention can be used for an air distribution organization for heavy oil combustion, and the air flow passing through the flame holder is organized into root air, primary cyclone air, lee area air supplement and secondary cyclone air, so that the oil mist is fully developed in a combustion chamber, the retention time of the oil mist in the combustion chamber is prolonged, the oil mist is preheated and evaporated, and the full combustion is promoted. Due to the full development of the oil mist in the combustion chamber and the rotation of the air flow, the oil mist is uniformly dispersed in the combustion chamber and is strongly mixed with oil gas, short and thick flames are generated, the oil mist burner is suitable for a compact hearth, and the oil mist can be prevented from striking on the hearth or a working medium.

Drawings

FIG. 1 is a cross-sectional view of a dual swirl flame holder of an embodiment;

FIG. 2 is a view taken along line A of FIG. 1;

FIG. 3 is a view from the direction B of FIG. 2;

FIG. 4 is a schematic view of the combustion gas flow organization of the dual swirl flame holder of the embodiment in the combustion can.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may also include different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.