CN216346376U - Cold ash bucket water-cooled wall - Google Patents
Cold ash bucket water-cooled wall Download PDFInfo
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- CN216346376U CN216346376U CN202122057446.6U CN202122057446U CN216346376U CN 216346376 U CN216346376 U CN 216346376U CN 202122057446 U CN202122057446 U CN 202122057446U CN 216346376 U CN216346376 U CN 216346376U
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Abstract
The utility model discloses a cold ash bucket water-cooled wall, which comprises a plurality of vertical water-cooled wall pipes and a plurality of transition pipe joints, wherein the lower end of each water-cooled wall pipe is connected with a water-cooled wall inlet header, and two adjacent water-cooled wall pipes are connected through flat steel; each transition pipe joint comprises an inclined main pipe and more than two vertical branch pipes connected with the main pipe, and each branch pipe is connected with a respective water wall pipe; two adjacent branch pipes of the same transition pipe joint are connected through transition flat steel; the utility model has the advantages of low manufacturing difficulty and good economy, prevents the flat steel from being over wide and over-temperature, and is beneficial to the safe operation of the boiler.
Description
Technical Field
The utility model relates to a cold ash bucket water-cooled wall, in particular to a cold ash bucket water-cooled wall for a supercritical gas furnace.
Background
In the existing gas power generation technology, the highest main machine parameter which is operated is a subcritical ultra-high temperature parameter (17.6 MPa/571 ℃), and the power generation efficiency is 40-42%. In order to further improve the power generation efficiency, supercritical gas furnace technology has been proposed and gradually put into the market.
The supercritical coal gas furnace technology is proposed and developed in two years, the technology of the water-cooled wall arrangement structure is very few, but the supercritical coal powder furnace structure is developed relatively well, a slag discharge device is required to be arranged at the bottom of the conventional coal powder furnace, in order to facilitate slag discharge, as shown in fig. 1, the angle A of the water-cooled wall of a cold ash hopper is generally designed to be 50-55 degrees, a supercritical unit is suitable for variable load operation, the water-cooled wall in a hearth basically adopts a spiral water-cooled wall structure, and the water-cooled wall 11 of the cold ash hopper and the water-cooled wall 12 of a middle hearth can be integrally made into a spiral section due to the large angle (50-55 degrees) of the cold ash hopper of the conventional supercritical coal powder furnace; the gas furnace does not need to arrange slag discharge due to the characteristics of gas fuel, so that the angle of the water-cooled wall of the ash cooling bucket is designed to be smaller, generally about 10 degrees, the height of a hearth can be reduced, and the overall economy of the boiler is improved. The angle of the ash cooling bucket of the gas furnace is small (about 10 degrees), if the water cooling wall of the ash cooling bucket is also made into a spiral section, due to the limitation of a helix angle, the using amount of the water cooling wall pipe is too large, the economical efficiency of the boiler is not high, and the manufacturing difficulty of the water cooling wall of the ash cooling bucket can be obviously increased. However, if the water-cooled wall of the ash cooling bucket of the supercritical gas furnace is made into a vertical section, as shown in fig. 2 and 3, if the vertical water-cooled wall 13 of the ash cooling bucket is directly connected with the middle spiral water-cooled wall 14, the flat steel 15 in the water-cooled wall of the ash cooling bucket is ultra-wide, and the flat steel is easy to overheat, so that the safe operation of the boiler is not facilitated.
Disclosure of Invention
The utility model aims to provide a cold ash bucket water-cooled wall which has the advantages of low manufacturing difficulty and good economical efficiency, prevents flat steel from being ultra-wide and over-temperature and is beneficial to the safe operation of a boiler, aiming at the defects in the prior art.
In order to achieve the purpose, the water-cooled wall of the cold ash bucket comprises a plurality of vertical water-cooled wall tubes, wherein the lower end of each water-cooled wall tube is connected with a water-cooled wall inlet header, and two adjacent water-cooled wall tubes are connected through flat steel; the method is characterized in that: the water cooling wall pipe is characterized by also comprising a plurality of transition pipe joints, wherein each transition pipe joint comprises an inclined main pipe and more than two vertical branch pipes connected with the main pipe, and each branch pipe is connected with a respective water cooling wall pipe; two adjacent branch pipes of the same transition pipe joint are connected through transition flat steel.
When in use, the main pipes are connected with the spiral water wall pipes of the middle hearth one by one; because the water wall tubes of the cold ash bucket are all vertically arranged, the manufacturing difficulty is low, the using amount of the water wall tubes is small, the economical efficiency is good, and the width of flat steel between two adjacent water wall tubes and the width of transition flat steel between two adjacent branch tubes can be reduced by connecting each branch tube of the transition tube joint with each water wall tube, so that the ultra-wide and over-high temperature of the flat steel can be prevented, and the safe operation of a boiler is facilitated;
as a further improvement of the utility model, two adjacent branch pipes of two adjacent transition pipe joints are connected through transition flat steel; the strength and stability of the water-cooled wall can be improved;
as a further improvement of the utility model, the inclination angle of the main pipe of the transition pipe joint is about 15.5-18.7 °; the inclination angle can be calculated and selected according to the size of a boiler hearth, the number of tubes on a water wall and the like;
in conclusion, the utility model has the advantages of low manufacturing difficulty and good economical efficiency, prevents the flat steel from being ultra-wide and over-temperature, and is beneficial to the safe operation of the boiler.
Drawings
FIG. 1 is a schematic view showing the structure of a furnace bottom water wall of a conventional pulverized coal furnace.
FIG. 2 is a schematic structural diagram of a water-cooled wall of a cold ash bucket of a gas furnace.
Fig. 3 is a partially enlarged view of fig. 2.
Fig. 4 is a schematic structural diagram of an embodiment of the present invention.
Fig. 5 is an enlarged view of fig. 4 at C.
Fig. 6 is a front view of the single transition joint of fig. 5.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 4 to 6, the cold ash bucket water wall of the embodiment includes a plurality of vertical water wall tubes 1 and a plurality of transition pipe joints 2, wherein the lower end of each water wall tube 1 passes through the cold ash bucket to be connected with a water wall inlet header 5, and two adjacent water wall tubes 1 are connected through a welded flat steel 6; each transition pipe joint 2 comprises an inclined main pipe 3, two vertical branch pipes 4 and branch pipes 9 which are connected with the main pipe 3 in a welding way, the inclination angle B of the main pipe 3 is about 15.5-18.7 degrees, and each branch pipe 4 and each branch pipe 9 are connected with the respective water wall pipe 1 in a welding way; two branch pipes 4 and branch pipes 9 of the same transition pipe joint 2 are connected through a transition flat steel 7 in a welding mode, and two adjacent branch pipes 9 and branch pipes 4 of two adjacent transition pipe joints 2 are connected through a transition flat steel 8 in a welding mode.
When in use, the main pipe 3 is correspondingly welded with the spiral water wall pipes 10 of the middle hearth one by one; because the water wall tubes 1 are vertically arranged, the manufacturing difficulty is low, the using amount of the water wall tubes is small, the economy is good, and the branch tubes 4 and the branch tubes 9 of the transition tube joint 2 are connected with the respective water wall tubes 1, so that the widths of flat steel 6 between two adjacent water wall tubes 1 and the widths of transition flat steel 7 and transition flat steel 8 between two adjacent branch tubes can be reduced, the ultra-wide and over-high temperature of each flat steel can be prevented, and the safe operation of a boiler is facilitated; the transition flat steels 7 and 8 can increase the strength and stability of the water wall; the vertical water wall tubes 1 are also beneficial to slag discharge of the cold ash bucket.
Claims (3)
1. A cold ash bucket water-cooling wall comprises a plurality of vertical water-cooling wall tubes, wherein the lower end of each water-cooling wall tube is connected with a water-cooling wall inlet header, and two adjacent water-cooling wall tubes are connected through flat steel; the method is characterized in that: the water cooling wall pipe is characterized by also comprising a plurality of transition pipe joints, wherein each transition pipe joint comprises an inclined main pipe and more than two vertical branch pipes connected with the main pipe, and each branch pipe is connected with a respective water cooling wall pipe; two adjacent branch pipes of the same transition pipe joint are connected through transition flat steel.
2. The cold ash bucket water-cooled wall of claim 1, wherein: and two adjacent branch pipes of two adjacent transition pipe joints are connected through transition flat steel.
3. The cold ash bucket water-cooled wall of claim 2, wherein: the inclination angle of the main pipe of the transition pipe joint is about 15.5-18.7 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122057446.6U CN216346376U (en) | 2021-08-30 | 2021-08-30 | Cold ash bucket water-cooled wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122057446.6U CN216346376U (en) | 2021-08-30 | 2021-08-30 | Cold ash bucket water-cooled wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216346376U true CN216346376U (en) | 2022-04-19 |
Family
ID=81170967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122057446.6U Active CN216346376U (en) | 2021-08-30 | 2021-08-30 | Cold ash bucket water-cooled wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216346376U (en) |
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2021
- 2021-08-30 CN CN202122057446.6U patent/CN216346376U/en active Active
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