CN209840079U - Boiler hood device - Google Patents

Abstract

The utility model provides a boiler hood device, which belongs to the technical field of fluidized bed boilers and comprises an air distribution plate, a sleeve, an air pipe and a bell jar, wherein the sleeve is fixed on the air distribution plate, the air pipe is fixed on the sleeve, the bell jar is fixed on the air pipe, the sleeve, the air pipe and the bell jar are coaxially arranged, and the bell jar is connected with the lower part of the air pipe through a tooth-shaped thread; the upper part of the air pipe close to the air inlet is provided with three rows of air inlet holes; the bell jar is characterized in that an air outlet hole is formed in the position, close to the lower portion, of the bell jar, the air outlet hole is communicated with the air inlet hole and is oval, the air outlet hole is obliquely arranged along the thickness direction of the bell jar, and namely the air outlet hole is formed in a mode that the inner portion is narrow and the outer portion is wide along the thickness of the bell jar. The utility model provides a boiler hood device utilizes the screw-thread fit of spliced pole and bell jar to make things convenient for the change of bell jar, has saved maintenance duration, has promoted efficiency. Meanwhile, through the improvement of the air inlet hole and the air outlet hole, the scouring of wind power to the hood device is reduced, and the service life of the device is prolonged.

Description

Boiler hood device

Technical Field

The utility model relates to a fluidized bed boiler technical field, concretely relates to boiler hood device.

Background

The boiler wind cap device is a part of a primary wind inlet device of the boiler, the primary wind inlet device is used for enabling air to uniformly enter a combustion area at the bottom end of the boiler so as to ensure the combustion of fuel, the primary wind inlet device comprises a wind distribution plate and a plurality of wind cap components densely arranged on the wind distribution plate, and the wind cap components have various structures, such as mushroom type, column type, spherical shape, umbrella type and other forms. The traditional air cap assembly of the fluidized bed boiler generally comprises a sleeve, an air pipe and a bell jar, the sleeve is fixed on an air distribution plate in a pouring mode, the air pipe is fixedly installed in the sleeve, the bell jar is reversely buckled on a shoulder of the air pipe and is welded and fixed with the air pipe at the shoulder, but the problem that the bell jar and the air pipe are welded and fixed is that the part of the bell jar and the air pipe is positioned close to the air distribution plate, and the air cap assembly is densely arranged, so the space between the adjacent air cap assemblies is small, and the disassembly of the damaged bell jar and the fixed installation of the new bell jar are very difficult.

Meanwhile, an air inlet hole is usually formed in the air pipe in the blast cap assembly, an air outlet hole is formed in the bell jar, and the damage of wind power to the blast cap assembly is very large due to the traditional opening mode, so that the damage of the blast cap assembly often occurs. And traditional hood subassembly height is usually around 320mm, and this size of discovery makes the fluidization position not high in the in-service use, and fluidization efficiency is very low, and the thickness of sleeve pipe is 2mm mostly in traditional hood subassembly, can't tolerate boiler high temperature, often appears damaging.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that current boiler hood subassembly exists, the utility model discloses improved the design on the basis of conventional art, provided a boiler hood device after the improvement to improve hood subassembly life, and make things convenient for staff's operation installation when needing to change the bell jar. The utility model provides a specific technical scheme as follows:

a boiler hood device comprises an air distribution plate, a sleeve, an air pipe and a bell jar, wherein the sleeve is fixed on the air distribution plate, the air pipe is fixed on the sleeve, the bell jar is fixed on the air pipe, and the sleeve, the air pipe and the bell jar are coaxially arranged;

the upper part of the air pipe close to the air inlet is provided with three rows of air inlet holes;

the bell jar is characterized in that an air outlet hole is formed in the position, close to the lower portion, of the bell jar, the air outlet hole is communicated with the air inlet hole, the air outlet hole is oval, the air outlet hole is obliquely arranged along the thickness direction of the bell jar, and namely the air outlet hole is arranged in a mode that the inner part is narrow and the outer part is wide along the thickness of the bell jar.

Preferably, the inclination angle of the air outlet hole along the thickness direction of the bell jar is 38-42 degrees. Preferably 40 degrees.

Preferably, the threads of the toothed threads are coated with a high temperature and wear resistant coating.

Preferably, a connecting hole is formed in the connecting position of the bell jar and the air pipe, and a connecting column is arranged on the air pipe corresponding to the connecting hole.

Preferably, the connecting column is integrally formed with the air duct.

Preferably, the connection hole is located inside the bell jar.

Preferably, the air pipe is inserted into the sleeve, and the air pipe and the sleeve are connected through threads.

Preferably, the height of the boiler hood device is 340-345 mm. Preferably 340 mm.

Preferably, the height of the sleeve is 183-. Preferably 184 mm.

Preferably, the thickness of the sleeve is 3 mm.

Compared with the prior art, the beneficial effects of the utility model are as follows:

(1) the utility model discloses give up original welded fastening's connected mode, increase connecting thread in the tuber pipe lower part to use profile of tooth screw thread, when the installation wait, only need rotate the connection that the bell jar just can realize and the tuber pipe in the upper end, make things convenient for the staff to operate the installation. And the connection of the air pipe and the bell jar is stable in a tooth-shaped threaded connection mode, the air pipe and the bell jar cannot be separated due to the wind power in the air pipe, and the bell jar is communicated with the air pipe after installation, so that normal air inlet is realized. Meanwhile, a high-temperature-resistant and anti-abrasion pattern layer is manufactured on the threads, and the high temperature resistance is 1300 ℃, so that the deformation of the threads due to the high temperature of a hearth is prevented, and the locking of the blast cap is prevented.

(2) The utility model relates to an on inside tuber pipe upper portion increased one row of fresh air inlet, changed three rows into from two rows of tradition, increased the amount of wind, owing to increased the fresh air inlet, can effectively reduce the erodeing of wind-force to the fresh air inlet. Meanwhile, the shape and the gradient of the air outlet on the bell jar are corrected, the bell jar is oval, the bell jar is designed to be in a form of being narrow inside and wide outside along the thickness direction of the bell jar, under the condition that the air outlet is scoured by wind power, smoke dust in the boiler can be prevented from entering the air pipe through the air inlet and the air outlet, and the smoke dust is prevented from being accumulated in the air pipe to influence the air quantity.

(3) The utility model discloses improve blast cap height according to furnace behaviour in service, 20-25mm higher than traditional blast cap to highly having carried out the adaptability to sleeve pipe and bell jar and improving, thereby can supplying air to the different regions of boiler inside, satisfy corresponding burning requirement, realize improving bed material fluidization efficiency, reduce the effect of furnace coking and ash leakage phenomenon. Meanwhile, the thickness of the sleeve is increased, the thickness of the sleeve is 3mm, and the sleeve can bear high temperature in the furnace and is thicker than the traditional sleeve in design, so that the service life is prolonged.

(4) The utility model discloses set up the connecting hole in the inside of bell jar, make the cooperation position of spliced pole and connecting hole be in the inside of bell jar, can not influenced by the combustion process of boiler inside. And the connecting column and the air pipe are integrally formed, so that the connection firmness between the connecting column and the air pipe is ensured, the connection firmness between the bell jar and the connecting column is also improved, the connecting column and the air pipe can keep better coaxiality, and the inner wall of the bell jar is uniformly stressed by wind after the bell jar is sleeved on the air pipe.

(5) The utility model discloses wholly use integrative casting forming technique, bell jar and tuber pipe adopt profile of tooth thread sealing connection, and the bell jar uses only to purchase single bell jar after wearing and tearing and changes, has saved most spare parts purchasing expense, and simple to operate is swift, has reduced the labour cost. And the threaded fit of the connecting column and the bell jar is utilized to facilitate the replacement of the bell jar, the maintenance time is saved, the influence on the normal operation of the boiler is reduced, the efficiency is improved, meanwhile, the connecting hole is arranged in the bell jar, the influence of smoke dust and temperature on the connecting column and the bell jar can be reduced, and the service life of the connecting column and the bell jar is prolonged.

Drawings

FIG. 1 is a cross-sectional view of a boiler hood assembly provided by the present invention;

fig. 2 is an enlarged view of the "castellated thread" at a in fig. 1.

The specific meanings of the symbols in the drawings are as follows:

1: a sleeve; 2: an air duct; 3: a bell jar; 4: an air inlet hole; 5: an air outlet; h: hood height; m: the height of the cannula.

Detailed Description

The following describes specific embodiments of the boiler hood device according to the present invention with reference to fig. 1-2.

Referring to fig. 1, the present embodiment provides a boiler hood assembly including a casing 1, a duct 2, and a bell jar 3. When being used for among the fluidized bed boiler equipment, because the grid plate is the grid plate that the one is fixed in the boiler and is close to the boiler bottom and be the level setting, on sleeve pipe 1 was fixed in the grid plate in this embodiment, on tuber pipe 2 was fixed in sleeve pipe 1, bell jar 3 was fixed in on tuber pipe 2, and sleeve pipe 1, tuber pipe 2 and bell jar 3 coaxial settings. The air pipe 2 is provided with three rows of air inlet holes 4 near the upper part, and compared with the traditional air inlet holes 4, the number of the air inlet holes 4 is increased, so that the air flow can be improved, and the scouring of the air inlet holes 4 by wind power is reduced.

The bell jar 3 is provided with an air outlet 5 at a position close to the lower part, the air outlet 5 is communicated with the air inlet 4 and is used for enabling the air outlet 5 to be oval, and the air outlet 5 is arranged at an inclination angle of 40 degrees along the thickness direction of the bell jar 3, namely, the air outlet 5 is arranged in a mode of being narrow inside and wide outside along the thickness of the bell jar 3. The oval air outlet 5 is obliquely arranged in the thickness direction of the bell jar 3 at 40 degrees, so that the scouring of the air outlet 5 by wind power can be greatly reduced, and the service life of the bell jar 3 is prolonged.

The connection part of the bell jar 3 and the air pipe 2 is provided with a connection hole, a connection column is arranged on the air pipe 2 corresponding to the connection hole, the connection column and the air pipe 2 are integrally formed, and the connection hole is positioned inside the bell jar 3 and can play a role in protection. The air pipe 2 is inserted into the sleeve 1 and is connected with the sleeve through threads, so that the disassembly is convenient.

The height h of the boiler blast cap device is 340-. The internal diameter of sleeve pipe 1 is 64mm in this embodiment, and sleeve pipe 1 thickness is 3mm, and thickened sleeve pipe 1 can better tolerate boiler high temperature.

Referring to fig. 2, in this embodiment, the bell jar 3 is connected to the lower portion of the air duct 2 by a tooth-shaped thread, and the thread of the tooth-shaped thread is coated with a high-temperature-resistant anti-wear coating. When the installation is waiting, only need rotate bell jar 3 at the upper end and just can realize the connection with tuber pipe 2, make things convenient for the staff to operate the installation. And the connection between the air pipe 2 and the bell jar 3 is stable by the tooth-shaped threaded connection mode, and the air pipe and the bell jar are not separated due to the internal wind power. After the installation, the bell jar 3 is communicated with the air pipe 2, thereby realizing normal air inlet. Meanwhile, a high-temperature-resistant and anti-abrasion pattern layer is manufactured on the threads, and the high temperature resistance is 1300 ℃, so that the deformation of the threads due to the high temperature of a hearth is prevented, and the locking of the blast cap is prevented.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.

Claims (10)

1. A boiler hood device comprises an air distribution plate, a sleeve, an air pipe and a bell jar, wherein the sleeve is fixed on the air distribution plate, the air pipe is fixed on the sleeve, the bell jar is fixed on the air pipe, and the sleeve, the air pipe and the bell jar are coaxially arranged;

the upper part of the air pipe close to the air inlet is provided with three rows of air inlet holes;

the bell jar is characterized in that an air outlet hole is formed in the position, close to the lower portion, of the bell jar, the air outlet hole is communicated with the air inlet hole, the air outlet hole is oval, the air outlet hole is obliquely arranged along the thickness direction of the bell jar, and namely the air outlet hole is arranged in a mode that the inner part is narrow and the outer part is wide along the thickness direction of the bell jar.

2. A boiler hood device according to claim 1, characterized in that the angle of inclination of said outlet openings in the thickness direction of the bell jar is 38-42 degrees.

3. The boiler hood assembly of claim 1, wherein the threads of said castellated threads are coated with a high temperature resistant wear coating.

4. The boiler hood device according to claim 1, wherein a connection hole is formed at a connection part of the bell jar and the air pipe, and a connection column is formed on the air pipe at a position corresponding to the connection hole.

5. The boiler hood assembly of claim 4, wherein the connecting column is integrally formed with the duct.

6. A boiler hood arrangement according to claim 4, characterized in that said attachment holes are located inside the bell jar.

7. The boiler hood device according to claim 1, wherein the air duct is inserted into the sleeve, and the air duct and the sleeve are connected by a screw.

8. The boiler hood device according to claim 1, wherein the height of the boiler hood device is 340-345 mm.

9. A boiler hood arrangement according to claim 8, characterized in that the height of said casing is 183-185 mm.

10. A boiler hood arrangement according to claim 1, characterized in that the thickness of the sleeve is 3 mm.