Boiler hood

Abstract

The utility model discloses a boiler hood which comprises an air supply pipe and a ceramic hood body, a positioning ring is arranged on the side wall of the lower portion of the air supply pipe, a pressing and abutting table matched with the positioning ring is arranged on the inner wall of the lower end of the ceramic hood body, the upper end of the air supply pipe is inserted into the ceramic hood body and is in threaded connection with the upper end of the ceramic hood body, and a plurality of air outlet holes are formed in the side wall of the lower portion of the ceramic hood body. A plurality of air supply holes are formed in the side wall of the air supply pipe. The air cap has the advantages that the air cap is made of wear-resistant ceramic materials, the wear resistance of the air cap is improved, the service life is prolonged, coal consumption can be reduced, combustion of the fluidized bed is stabilized, generation of NOx and SOx can be effectively controlled, and the heat efficiency of the boiler is improved. Meanwhile, the positioning ring is arranged on the side wall of the air supply pipe, the pressing and abutting table matched with the ceramic air cap is arranged at the lower end of the ceramic air cap to achieve tight contact of the air supply pipe and the ceramic air cap, the upper end of the ceramic air cap is fixed in a threaded connection mode, disassembly and assembly are more convenient and faster, the ceramic air cap can be independently replaced during maintenance, and maintenance cost is low.

Description

Technical Field

[0001] This utility model relates to the field of wind cap technology, and in particular to a boiler wind cap. Background Technology

[0002] The boiler air cap is used to feed boiler air into the furnace bed material. Controlling the air supply volume keeps the furnace bed material in a fluidized or boiling state, ensuring complete combustion of coal. Traditional air caps are made of high-temperature resistant steel. Under the impact of high-temperature coal particles and slag, the air cap head suffers severe wear, resulting in high energy consumption, high maintenance costs, long downtime for repairs, and reduced production efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a boiler wind cap that solves the problems of poor wear resistance and long downtime maintenance time of existing wind caps.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A boiler vent cap includes an air supply pipe and a ceramic vent cap. The lower side wall of the air supply pipe is provided with a positioning ring, and the lower inner wall of the ceramic vent cap is provided with a pressing platform adapted to the positioning ring. The upper end of the air supply pipe is inserted into the ceramic vent cap and threadedly connected to the upper end of the ceramic vent cap. The lower side wall of the ceramic vent cap is provided with multiple air outlet holes, and the side wall of the air supply pipe is provided with multiple air supply holes.

[0006] Furthermore, the upper end of the ceramic wind cap is provided with a mounting hole, and the upper end of the air supply pipe is provided with a threaded plug adapted to the mounting hole. The upper end of the threaded plug extends out of the mounting hole and is connected to a locking nut.

[0007] Furthermore, the air outlet is inclined downwards from inside the ceramic hood towards outside the ceramic hood, and the angle between the air outlet and the horizontal line is 5-15°.

[0008] Furthermore, the angle between the air outlet and the horizontal line is 8°.

[0009] Furthermore, the lower part of the ceramic hood is integrally formed with a first thickened protrusion corresponding to the position of the air outlet, and the air outlet passes through the first thickened protrusion.

[0010] Furthermore, the top wall of the first thickened protrusion is an inclined surface, which is inclined downwards from the ceramic wind cap toward the first thickened protrusion.

[0011] Furthermore, the upper end of the ceramic wind cap is integrally formed with a second thickened protrusion corresponding to the position of the mounting hole, and the mounting hole passes through the second thickened protrusion.

[0012] Furthermore, the air supply duct and positioning ring are made of heat-resistant steel.

[0013] This invention has the following advantages: the wind cap is made of wear-resistant ceramic material, which increases the wear resistance of the wind cap, reduces coal consumption, stabilizes fluidized bed combustion, and effectively controls NO. x and SO x This process generates heat, improves combustion efficiency, and ensures uniform airflow distribution, promoting complete fuel combustion, reducing carbon content in ash, enhancing boiler thermal efficiency, and extending service life. Simultaneously, a positioning ring is installed on the side wall of the air supply duct, and a matching pressure plate is installed at the lower end of the ceramic air cap to ensure tight contact between the two. The upper end is fixed by a threaded connection, making disassembly and assembly more convenient and quick. During maintenance, the ceramic air cap can be replaced separately, resulting in low maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 A schematic diagram of a structure for adding thickened protrusions to a ceramic wind cap.

[0016] In the figure, 1-air supply pipe, 2-ceramic wind cap, 3-positioning ring, 4-air outlet, 5-air supply hole, 6-threaded plug, 7-locking nut, 8-first thickened protrusion, 9-inclined surface. Detailed Implementation

[0017] 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. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] refer to Figure 1 As shown, one embodiment of this utility model is as follows:

[0024] A boiler vent cap includes an air supply pipe 1 and a ceramic vent cap 2. The lower side wall of the air supply pipe 1 is provided with a positioning ring 3. The lower inner wall of the ceramic vent cap 2 is provided with a pressing platform adapted to the positioning ring 3. The upper end of the air supply pipe 1 is inserted into the ceramic vent cap 2 and threadedly connected to the upper end of the ceramic vent cap 2. The lower side wall of the ceramic vent cap 2 is provided with a plurality of air outlet holes 4, and the side wall of the air supply pipe 1 is provided with a plurality of air supply holes 5.

[0025] Specifically, the air supply duct 1 and the positioning ring 3 are made of heat-resistant steel.

[0026] The air cap is made of wear-resistant ceramic material, which increases its wear resistance and extends its service life. The matching of the air outlet and air supply holes effectively reduces coal consumption, stabilizes fluidized bed combustion, and effectively controls NO. x and SO xThis process generates heat, improves combustion efficiency, and ensures uniform airflow distribution, promoting complete fuel combustion, reducing the carbon content of ash, and enhancing boiler thermal efficiency. Simultaneously, a positioning ring 3 is installed on the side wall of the air supply duct 1, and a matching pressure plate is installed at the lower end of the ceramic air cap 2 to ensure tight contact between the two. The upper end is fixed by a threaded connection, making disassembly and assembly more convenient and quick. During maintenance, only the ceramic air cap 2 needs to be replaced, reducing maintenance costs.

[0027] Furthermore, the upper end of the ceramic wind cap 2 is provided with a mounting hole, and the upper end of the air supply pipe 1 is provided with a threaded plug 6 adapted to the mounting hole. The upper end of the threaded plug 6 extends out of the mounting hole and is connected to a locking nut 7.

[0028] The upper ends of the air supply duct 1 and the ceramic wind cap are connected to the threaded plug 6 by locking nuts 7, and the lower ends are pressed against the positioning ring 3 by a pressing platform, so as to realize the installation and fixation of the air supply duct 1 and the ceramic wind cap, making disassembly and assembly more convenient and quick, and maintenance easier.

[0029] Specifically, the air outlet 4 is inclined downwards from inside the ceramic hood 2 towards the outside of the ceramic hood 2, and the angle between the air outlet 4 and the horizontal line is 5-15°, more preferably 8°. The specific angle value can be selected by those skilled in the art according to the actual situation.

[0030] The angled air outlet reduces the chance of larger ash particles clogging the holes, and also prevents airflow from scouring adjacent boiler vent caps, thus reducing wear on the vent caps.

[0031] refer to Figure 2 As shown, to further extend the service life of the ceramic wind cap, a first thickened protrusion 8 is integrally formed on the lower part of the ceramic wind cap 2 corresponding to the position of the air outlet 4, and the air outlet 4 passes through the first thickened protrusion 8. The top wall of the first thickened protrusion 8 is an inclined surface 9, which is inclined downward from the ceramic wind cap 2 toward the first thickened protrusion 8.

[0032] To ensure the strength of the threaded connection, the upper end of the ceramic wind cap 2 is integrally formed with a second thickened protrusion corresponding to the position of the mounting hole, and the mounting hole passes through the second thickened protrusion.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A boiler hood characterised in that: The air supply pipe is provided with a positioning ring on the lower side wall, the ceramic air cap is provided with a pressing table on the inner wall of the lower end, the upper end of the air supply pipe is inserted into the ceramic air cap and is screwed with the upper end of the ceramic air cap, the lower side wall of the ceramic air cap is provided with a plurality of air outlet holes, and the side wall of the air supply pipe is provided with a plurality of air supply holes.

2. A boiler hood as claimed in claim 1, characterised in that: The upper end of the ceramic air cap is provided with a mounting hole, the upper end of the air supply pipe is provided with a threaded plug matched with the mounting hole, the upper end of the threaded plug penetrates the mounting hole and is connected with a locking nut.

3. A boiler hood as claimed in claim 1, wherein: The air outlet hole is arranged downwardly and obliquely from the inside of the ceramic air cap to the outside of the ceramic air cap, and the included angle between the air outlet hole and the horizontal line is 5-15°.

4. A boiler hood as claimed in claim 3, characterised in that: The included angle between the air outlet hole and the horizontal line is 8°.

5. A boiler hood as claimed in claim 1, wherein: The lower part of the ceramic air cap is integrally formed with a first thickened protruding part corresponding to the position of the air outlet hole, and the air outlet hole penetrates the first thickened protruding part.

6. A boiler hood according to claim 5, characterised in that: The top wall of the first thickened protruding part is an inclined surface, which is arranged downwardly and obliquely from the ceramic air cap to the first thickened protruding part.

7. A boiler hood as claimed in claim 2, wherein: The upper end of the ceramic air cap is integrally formed with a second thickened protruding part corresponding to the position of the mounting hole, and the mounting hole penetrates the second thickened protruding part.

8. A boiler hood according to claim 1, characterised in that: The air supply pipe and the positioning ring are made of heat-resistant steel.

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