Boiler barrel water supply system capable of preventing pipe explosion of water cooling wall
By setting up a grating plate and a separating vertical plate in the crisscross tube at the bottom of the boiler, the bubbles are prevented from entering the water-cooled wall tube, and the problem of water-cooled wall tube explosion in the circulating fluidized bed boiler is solved, achieving water flow stability and furnace water supply security.
Patent Information
- Application Number
- CN202420129715.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-18
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-01-18
AI Technical Summary
The water-cooled wall pipe in the circulating fluidized bed boiler is prone to burst the pipe due to the entry of bubbles, causing dry burning when the furnace flame is heated, and the prior art is difficult to effectively prevent the entry of bubbles.
At the bottom of the pot drum, a grating plate bracket and a cross-shaped tube are arranged to separate the vertical plates. The grating plate and vertical plate are immersed in the pot water to form a square and cross-shaped structure to prevent vortex bubbles from entering the downward tube.
By uniformizing the distribution of water flow velocity, we prevent the formation of vortex bubbles, effectively avoid the phenomenon of water-cooled wall pipe bursting, and ensure the stable water supply in the furnace.
Smart Images
Figure CN222316946U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a circulating fluidized bed boiler, in particular to a boiler drum water supply system which can prevent the water cooling wall in the furnace of the circulating fluidized bed boiler from bursting. Background Art
[0002] A circulating fluidized bed steam boiler is a device for producing steam. A water-cooled wall tube is arranged in the furnace of the steam boiler. The water-cooled wall tube is usually a φ51 tube. After the water-cooled wall is heated by the flame in the furnace, the water in the water-cooled wall tube row will be converted into saturated steam. The saturated steam enters the steam-water separator in the drum to separate the steam and water. The water in the water-cooled wall is transported by the downcomer. The top of the downcomer is connected to the pipe joint of the drum. The water in the drum enters the downcomer through the pipe joint. The boiler water in the drum has two functions at the same time: one is to provide boiler water for the water-cooled wall tube through the downcomer, and the other is to heat the saturated steam. Steam, after entering the water in the boiler drum, is separated by the steam-water separator and then enters the upper part of the boiler drum, and then is output to the outside of the boiler from the upper part of the boiler drum; therefore, the water in the boiler drum is easily disturbed by the steam in the steam-water separator, resulting in the formation of steam vortex in the downcomer pipe joint. When the water flow velocity in the boiler drum is too large or unevenly distributed, bubbles will enter the downcomer with the water flow and enter the water-cooled wall tube with the boiler water. Since the flame temperature of the furnace is as high as about 900°C, the water-cooled wall tube containing bubbles will be dry-burned and burst. How to avoid bubbles in the water-cooled wall tube has become a difficult problem that needs to be solved when the boiler drum supplies water to the furnace. Summary of the invention
[0003] The utility model provides a boiler drum water supply system which can prevent water cooling wall tube bursting, and solves the technical problem of how to prevent water containing bubbles in the boiler drum from entering into the water cooling wall tubes.
[0004] The utility model solves the above technical problems through the following technical solutions:
[0005] A boiler drum water supply system capable of preventing water-cooled wall tube bursts comprises a boiler drum and a down pipe, wherein a down pipe connection port is arranged at the bottom end of the boiler drum, the down pipe is connected to the down pipe connection port, a grid plate bracket is arranged on the inner side wall of the bottom end of the boiler drum outside the down pipe connection port, and a grid plate is arranged on the grid plate bracket; a cross-shaped in-tube partition vertical plate is arranged in the down pipe below the down pipe connection port.
[0006] Boiler water is arranged in the boiler drum, the grid plate is a lattice-shaped grid plate, the grid plate and the cross-shaped tube inner dividing vertical plate are immersed in the boiler water, and a steam-water separator is arranged in the boiler drum above the grid plate.
[0007] The utility model has a simple structure and overcomes the phenomenon of sudden change of flow direction and sudden increase of water velocity of water in the boiler drum at the downcomer pipe mouth through the grille, so that the water flow velocity distribution around the pipe mouth is more uniform, and the occurrence of vortex bubble phenomenon formed at the downcomer pipe mouth is effectively prevented. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a structural schematic diagram of the utility model;
[0009] Figure 2 It is a structural schematic diagram of the grid plate 5 of the utility model;
[0010] Figure 3 It is a schematic structural diagram of the cross-shaped inner tube partition vertical plate 6 of the utility model; Implementation
[0011] The utility model is described in detail below with reference to the accompanying drawings:
[0012] A boiler drum water supply system capable of preventing water-cooled wall tube bursts comprises a boiler drum 1 and a down pipe 3, wherein a down pipe connection port 2 is provided at the bottom end of the boiler drum 1, the down pipe 3 is connected to the down pipe connection port 2, a grid plate bracket 4 is provided on the inner side wall of the bottom end of the boiler drum 1 outside the down pipe connection port 2, and a grid plate 5 is provided on the grid plate bracket 4; a cross-shaped in-tube partition vertical plate 6 is provided in the down pipe 3 below the down pipe connection port 2.
[0013] Boiler water 7 is arranged in the boiler drum 1, and the grid plate 5 is a lattice-shaped grid plate. The grid plate 5 and the cross-shaped tube partition vertical plate 6 are immersed in the boiler water 7. A steam-water separator is arranged in the boiler drum 1 above the grid plate 5. When the steam-water separator is working, the steam in the boiler drum will form a vortex-shaped eddy. A grid plate is installed at the upper part of the downcomer inlet, and a cross baffle is installed at the downcomer inlet at the same time. The lower edge of the grid is at a certain distance from the downcomer outlet, so that the vortex is blocked at the upper part of the grid plate. The cross baffle further diverts water to prevent the formation of a vortex, so that the water flow is more stable and uniform. The grid plate is composed of four kinds of steel plates spliced or welded, and the cross baffle is composed of cross-crossed steel plates.
Claims
1. A boiler drum water supply system capable of preventing water-cooled wall tube burst, comprising a boiler drum (1) and a downcomer (3), wherein a downcomer connection port (2) is provided at the bottom end of the boiler drum (1), and the downcomer (3) is connected to the downcomer connection port (2), characterized in that: A grid plate support (4) is provided on the inner side wall of the bottom end of the boiler drum (1) outside the down-pipe connection port (2), and a grid plate (5) is provided on the grid plate support (4); and a cross-shaped in-tube partition vertical plate (6) is provided in the down-pipe (3) below the down-pipe connection port (2).
2. A boiler drum water supply system capable of preventing water wall tube burst according to claim 1, characterized in that: Boiler water (7) is arranged in the boiler drum (1); the grid plate (5) is a grid plate in a square shape; the grid plate (5) and the cross-shaped inner tube partition vertical plate (6) are both immersed in the boiler water (7); and a steam-water separator is arranged in the boiler drum (1) above the grid plate (5).