Fuel atomizing structure

Abstract

The application discloses a fuel atomization structure, which comprises a nozzle, a distribution body and an outer wall with a cavity; the distribution body has a free end and a fixed end; an end face of the fixed end of the distribution body is provided with a fuel inlet; the outer wall further comprises an end cover, and the fixed end of the distribution body is fixed to the end cover; the free end of the distribution body is located in the cavity; the nozzle has a tail part and a head part; the tail part of the nozzle is fixed to an end face of the free end of the distribution body; an outer side wall of the free end of the distribution body is provided with N uniformly distributed through holes I, and the end face of the free end is provided with a circular groove; each through hole I and the circular groove form an air flow channel. The fuel atomization structure provided by the application avoids the formation of carbon deposition on the outer wall of the reactor and the formation of carbon deposition on the wall surface of the nozzle, and improves the service life of the nozzle.

Description

Technical Field

[0001] This application relates to a fuel atomization structure, belonging to the field of fuel cell technology. Background Technology

[0002] During the startup process of a fuel cell system, the system needs to be heated to a specified temperature before it can start working. The usual technical method is to burn the fuel to release heat and heat the entire system. However, the atomized fuel enters the reactor and falls on the outer wall and nozzle, causing carbon deposits and affecting the service life of the nozzle. Summary of the Invention

[0003] One aspect of this application provides a fuel atomizing structure, the fuel atomizing structure comprising a nozzle, a columnar distribution body, and an outer wall having a cylindrical cavity;

[0004] The distribution body has a free end and a fixed end; the fixed end of the distribution body is provided with a fuel inlet.

[0005] The outer wall also includes an end cap, and the fixed end of the distribution body is fixed to the end cap; the free end of the distribution body is located inside the cavity;

[0006] The nozzle is located inside the cavity, and the nozzle has a tail and a head;

[0007] The tail of the nozzle is fixed to the end face of the free end of the distribution body; the head of the nozzle faces away from the end cap.

[0008] The fuel inlet is connected to the tail of the nozzle;

[0009] The outer wall of the free end of the distribution body is provided with N through holes I evenly distributed along any circumferential direction.

[0010] The end face of the free end of the distribution body is provided with a circular groove along any circumferential direction;

[0011] The position of each through hole I is adapted to the position of the circular groove, forming N airflow channels.

[0012] Optionally, an air inlet is provided on the upper part of the outer wall along the tangential direction of the circumference, so that air enters the cylindrical cavity along the tangential direction.

[0013] Optionally, N≥3 is less than an integer multiple of the outer wall circumference diameter and the through hole diameter.

[0014] Optionally, the end face of the free end of the distribution body is further provided with a cylindrical protrusion, and the protrusion is provided with a mounting hole for fixing the tail of the nozzle.

[0015] The mounting hole is provided with an internal thread that matches the external thread at the tail of the nozzle for a tight fit.

[0016] Optionally, the end face of the free end of the distribution body is provided with an extended baffle, which forms a slit with the outer wall;

[0017] The free end face of the main body of the distribution is provided with an extended baffle, which forms a slit with the outer wall;

[0018] The ratio of the slit size to the cavity width is 1 / 2 to 1 / 10, depending on the gas flow rate.

[0019] Optionally, the diameter of the distribution body is smaller than the diameter of the cavity;

[0020] Optionally, the distance between the outer wall of the free end of the distribution body and the single-sided gap of the outer wall is 4 to 6 times the diameter of the blind hole II.

[0021] Optionally, the fuel atomization structure further includes an air intake pipe;

[0022] The air intake pipe is connected to the air intake port.

[0023] This invention addresses fuel atomization combustion and comprises the following structure: a nozzle, a main distribution structure, and sidewalls. Fuel enters the reactor through the nozzle and undergoes atomization combustion. To prevent atomized fuel from entering the reactor and falling onto the outer wall, causing carbon buildup, an additional air path is added for protection. This air enters the outer wall cavity tangentially. A portion of the air enters the reactor through the gap between the outer wall and the main distribution structure, forming an air wall on the inner side of the outer wall to prevent contact between the atomized fuel and the outer wall. Another portion of the air enters the reactor near the nozzle through four pores in the main distribution structure, creating a negative pressure zone near the nozzle wall to prevent contact between the atomized fuel and the nozzle wall, thus avoiding carbon buildup.

[0024] The beneficial effects that this application can produce include:

[0025] The fuel atomization structure provided in this application avoids the formation of carbon deposits on the outer wall of the reactor and on the nozzle wall, thereby improving the life of the nozzle. Attached Figure Description

[0026] Figure 1 Figure a is a schematic diagram of the fuel atomization structure in the embodiments of this application, wherein figure a is a schematic diagram; figure b is an axial cross-sectional view; and figure c is a top view cross-sectional view.

[0027] in:

[0028] 1. Nozzle; 2. Distribution body; 3. Outer wall; 4. Inlet pipe; 5. Blind hole I; 6. Blind hole II. Detailed Implementation

[0029] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0030] Example 1

[0031] A fuel atomizing structure includes a nozzle 1, a distribution body 2, an outer wall 3, and an air intake pipe 4.

[0032] The upper end face of the distribution body 2 is provided with a fuel inlet; the lower end face of the distribution body 2 is provided with a cylindrical protrusion, and the cylindrical protrusion is provided with a threaded hole with internal thread I, which communicates with the mounting hole I provided on the lower end face of the distribution body 2. The side of the mounting hole I near the cylindrical protrusion is provided with an internal thread II that is the same as the internal thread I. The internal thread I and the internal thread II communicate with each other and cooperate with the external thread of the nozzle 1 to fasten the nozzle. The side of the mounting hole away from the cylindrical protrusion is a through hole, which communicates with the inclined surface of the fuel inlet to form a fuel chamber.

[0033] The nozzle head includes a square mounting platform, which is sealed and fixed to the lower end face of the cylindrical protrusion.

[0034] The main body 2 has four blind holes I evenly distributed along the same circumferential direction on its side wall, and four blind holes II evenly distributed along the circumferential direction on its lower end face. The blind holes I and blind holes II are the same, forming air holes.

[0035] The single-sided gap I between the side wall of the distribution body 2 and the outer wall is 5 times the diameter of the blind hole II.

[0036] The outer wall 3 is also provided with an inlet air hole that is tangent to the outer wall. The air inlet pipe 4 is the same as the air inlet, forming an air passage that is tangent to the circumference of the outer wall 3.

[0037] Air enters the outer wall cavity along a tangential air passage. Part of the air enters the reactor through the gap between the outer wall and the main body of the distributor, while another part enters the reactor near the nozzle through the four air holes of the main body of the distributor. This prevents the formation of a negative pressure zone near the nozzle and avoids carbon buildup on the nozzle wall.

[0038] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A fuel atomization structure, characterized in that, The fuel atomization structure includes a nozzle, a columnar distribution body, and an outer wall with a cylindrical cavity; The distribution body has a free end and a fixed end; the fixed end of the distribution body is provided with a fuel inlet. The outer wall also includes an end cap, and the fixed end of the distribution body is fixed to the end cap; the free end of the distribution body is located inside the cavity; The nozzle is located inside the cavity, and the nozzle has a tail and a head; The tail of the nozzle is fixed to the end face of the free end of the distribution body; the head of the nozzle faces away from the end cap. The fuel inlet is connected to the tail of the nozzle; The outer wall of the free end of the distribution body is provided with N through holes I evenly distributed along any circumferential direction. The end face of the free end of the distribution body is provided with a circular groove along any circumferential direction; The position of each through hole I is adapted to the position of the circular groove, forming N airflow channels; An air inlet is provided on the upper part of the outer wall along the tangential direction of the circumference, so that air enters the cylindrical cavity along the tangential direction; The free end face of the main body of the distribution is provided with an extended baffle, which forms a slit with the outer wall; The ratio of the slit size to the cavity width is 1 / 2 to 1 / 10; There is a gap between the outer wall of the free end of the distribution body and the outer wall.

2. The fuel atomization structure according to claim 1, characterized in that, The N≥3.

3. The fuel atomization structure according to claim 1, characterized in that, The end face of the free end of the distribution body is also provided with a cylindrical protrusion, and the protrusion is provided with a mounting hole for fixing the tail of the nozzle. The mounting hole is provided with an internal thread that matches the external thread at the tail of the nozzle for a tight fit.

4. The fuel atomization structure according to claim 1, characterized in that, The diameter of the main distribution body is smaller than the diameter of the cavity; The distance between the outer wall of the free end of the distribution body and the single-sided gap of the outer wall is 4 to 6 times the diameter of the circular groove.

5. The fuel atomization structure according to claim 1, characterized in that, The fuel atomization structure also includes an air intake pipe; The air intake pipe is connected to the air intake port.

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