CN215831901U - Double-cyclone pulverized coal burner of W-shaped boiler - Google Patents
Double-cyclone pulverized coal burner of W-shaped boiler Download PDFInfo
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- CN215831901U CN215831901U CN202120637326.0U CN202120637326U CN215831901U CN 215831901 U CN215831901 U CN 215831901U CN 202120637326 U CN202120637326 U CN 202120637326U CN 215831901 U CN215831901 U CN 215831901U
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Abstract
The utility model discloses a double-cyclone pulverized coal burner of a W-shaped boiler, which comprises a cyclone cylinder, an exhaust nozzle connected with the cyclone cylinder and a sleeve; the method is characterized in that: the lower end of the cyclone cylinder is fixedly connected with an inner sleeve, the upper end of the main nozzle is sleeved outside the inner sleeve and is connected through more than two radial bolts, the outer side of the inner sleeve and the inner side of the upper end of the main nozzle are provided with matched labyrinth steps, and a sealant is arranged between the two labyrinth steps; a main sleeve is connected outside a main nozzle below the bolt; the nozzle head part which is burnt is easy to replace during maintenance, the cyclone cylinder does not need to be dismantled, the workload and difficulty of maintenance are reduced, and the maintenance efficiency can be improved.
Description
Technical Field
The utility model relates to a double-cyclone burner, in particular to a double-cyclone burner for a W-shaped boiler.
Background
The W-type boiler is a special type of furnace dedicated to burning low volatile anthracite and lean coals and has unique safety and stability advantages over other types of furnaces, and therefore has long been the recommended type of furnace for this particular type of coal. The double cyclone pulverized coal burner is the most used burner in this type of furnace, and is generally used as a standard configuration for a W-type boiler.
The double-cyclone pulverized coal burner adopts the principle of a cyclone separator, and the existing structure of the double-cyclone pulverized coal burner is shown in figure 1, and comprises a cyclone cylinder 10, an exhaust nozzle and sleeve 11 connected with the cyclone cylinder 10, and a main nozzle and sleeve 12; when in use, the cyclone cylinder 10 is connected with the large air box 15 and the grading air box 16, and the exhaust nozzle and the sleeve 11, the main nozzle and the sleeve 12 all penetrate through the water wall pipe 17; the burner has the advantages of stable and reliable operation and certain regulation ratio, but has the biggest defect that the structure of the cyclone 10 needs larger space, so the arch part of the whole boiler is occupied by the cyclone; the main nozzle is high in combustion temperature and easy to damage, when the burner is overhauled and replaced, the burner body is required to be integrally pulled out of the air box for overhauling, the burner is very difficult to overhaul in a furnace arch area with a very tight space, damaged parts (lining wear-resistant materials are difficult to operate) and a plurality of welding lines between the cyclone cylinder 10 and the grading air box 16 and the panel of the large air box 15 are required to be cut off, the overhauling workload is large, the implementation is difficult, and great troubles are brought to the overhauling work of a power plant.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a double-cyclone pulverized coal burner of a W-shaped boiler, which is easy to replace the head of a burnt nozzle during maintenance without dismantling a cyclone, reduces the workload and difficulty of maintenance and can improve the maintenance efficiency.
In order to achieve the aim, the double-cyclone pulverized coal burner of the W-shaped boiler comprises a cyclone cylinder, an exhaust nozzle connected with the cyclone cylinder and a sleeve; the method is characterized in that: the lower end of the cyclone cylinder is fixedly connected with an inner sleeve, the upper end of the main nozzle is sleeved outside the inner sleeve and is connected through more than two radial bolts, the outer side of the inner sleeve and the inner side of the upper end of the main nozzle are provided with matched labyrinth steps, and a sealant is arranged between the two labyrinth steps; and a main sleeve is connected outside a main nozzle below the bolt.
The main nozzle is connected with the inner sleeve through the bolt, when in maintenance, the bolt is loosened, the main nozzle and the main sleeve penetrate through the water-cooled wall from the inner side of the hearth, and the head of the nozzle which is burnt can be replaced without dismantling the cyclone, so that the workload and difficulty of maintenance are reduced, and the maintenance efficiency can be improved; sealing agent is added to labyrinth steps on the outer side of the inner sleeve and the inner side of the upper end of the main nozzle, so that coal dust leakage can be avoided;
as a further improvement of the utility model, the sealant is a high-temperature sealant; the adhesive has good bonding and sealing effects;
as a further improvement of the utility model, the outer end of the bolt does not exceed the outer diameter of the main sleeve in the radial direction; the air inlet is convenient to penetrate through the large air box and the grading air box during installation;
in conclusion, the nozzle head part which is burnt is easy to replace during maintenance, the cyclone cylinder does not need to be dismantled, the workload and difficulty of maintenance are reduced, and the maintenance efficiency can be improved.
Drawings
Fig. 1 is a front view showing a state in which a conventional double cyclone pulverized coal burner is used.
Fig. 2 is a front view of an embodiment of the present invention. .
Fig. 3 is a partially enlarged view of a portion a of fig. 2.
Fig. 4 is a view in the direction P of fig. 3.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 2 to 4, the double-cyclone pulverized coal burner of the W-shaped boiler of this embodiment includes a cyclone 1, a waste gas nozzle 2 connected to the cyclone, and a sleeve 3; an inner sleeve 4 is fixedly welded at the lower end of the cyclone cylinder 1, the upper end of the main nozzle 5 is sleeved outside the inner sleeve 4 and is connected through three radial bolts 6, the three bolts 6 are uniformly distributed on the circumference, matched labyrinth steps are arranged on the outer side of the inner sleeve 4 and the inner side of the upper end of the main nozzle 5, and high-temperature sealant serving as sealant 7 is arranged between the two labyrinth steps; a main sleeve 8 is connected outside the main nozzle 5 below the bolt 6, and the outer end of the bolt 6 does not exceed the outer diameter of the main sleeve 8 in the radial direction;
when the device is installed, the burner is arranged on a furnace arch of a boiler, the cyclone cylinder 1 is connected with the large air box and the grading air box, and the exhaust nozzle 2, the sleeve 3, the main nozzle 5 and the main sleeve 8 all downwards penetrate through the water wall pipe; the main nozzle 5 is connected with the inner sleeve 4 through the bolt 6, when in maintenance, the bolt 6 is loosened, the main nozzle 5 and the main sleeve 8 pass through a water-cooled wall from the inside of the hearth to replace the head of the nozzle which is burnt out, the cyclone cylinder 1 does not need to be dismantled, the workload and difficulty of maintenance are reduced, and the maintenance efficiency can be improved; the sealing agent 7 is added to the labyrinth step between the outer side of the inner sleeve 4 and the inner side of the upper end of the main nozzle 5, so that the leakage of coal dust can be avoided; the outer end of the bolt 6 does not exceed the outer diameter of the main sleeve 8 in the radial direction, so that the bolt 6 can conveniently penetrate through the large air box and the grading air box during installation.
Claims (3)
1. A double-cyclone pulverized coal burner of a W-shaped boiler comprises a cyclone, an exhaust nozzle connected with the cyclone and a sleeve; the method is characterized in that: the lower end of the cyclone cylinder is fixedly connected with an inner sleeve, the upper end of the main nozzle is sleeved outside the inner sleeve and is connected through more than two radial bolts, the outer side of the inner sleeve and the inner side of the upper end of the main nozzle are provided with matched labyrinth steps, and a sealant is arranged between the two labyrinth steps; and a main sleeve is connected outside a main nozzle below the bolt.
2. The double-cyclone pulverized coal burner of a W-type boiler as claimed in claim 1, wherein: the sealant is high-temperature sealant.
3. The double cyclone pulverized coal burner of a W-type boiler as claimed in claim 1 or 2, wherein: the outer end of the bolt does not exceed the outer diameter of the main sleeve in the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120637326.0U CN215831901U (en) | 2021-03-30 | 2021-03-30 | Double-cyclone pulverized coal burner of W-shaped boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120637326.0U CN215831901U (en) | 2021-03-30 | 2021-03-30 | Double-cyclone pulverized coal burner of W-shaped boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215831901U true CN215831901U (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120637326.0U Active CN215831901U (en) | 2021-03-30 | 2021-03-30 | Double-cyclone pulverized coal burner of W-shaped boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215831901U (en) |
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2021
- 2021-03-30 CN CN202120637326.0U patent/CN215831901U/en active Active
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