Boiler bottom water seal assembly

Abstract

The utility model discloses a boiler bottom water seal assembly, and relates to the technical field of boiler water seal tank optimization. The water seal device comprises a water seal inserting plate arranged on a water cooling wall tube of the dry bottom hopper, the water seal inserting plate extends into the liquid level of a water seal tank from the top surface of the water seal tank, a dust blocking mechanism is installed on the inner side of the water seal inserting plate, the dust blocking mechanism is provided with a flexible steel plate, the bottom side of the flexible steel plate abuts against the top surface of the inner side of the water seal tank, and the bottom side of the flexible steel plate abuts against the water cooling wall tube of the dry bottom hopper. The width of the flexible steel plate is not less than that of the inner side of the water seal tank; the problem that dust accumulation in the water seal tank is aggravated due to the fact that steam generated by the water seal tank adsorbs fine dust is solved.

Description

Technical Field

[0001] This utility model relates to the field of boiler water seal trough optimization technology, specifically, a boiler bottom water seal component. Background Technology

[0002] Industrial water sources contain relatively few impurities, so they shouldn't cause ash accumulation. However, the ash accumulation inside the water seal tank is significantly higher than outside, and considerably higher than the inner tank itself. Crucially, the ash is primarily fine ash, not the fine slag as commonly believed. The ash accumulation inside the water seal tank is mainly due to the settling of fine ash. The reason the ash height is so much higher than the tank is that during normal operation, the flue gas temperature inside the water seal tank is around 300℃, inevitably causing moisture evaporation. The settled fine ash continuously combines with the water vapor evaporating and seeping from the upper tank, causing the ash accumulation to rise continuously.

[0003] Clogged water seal grooves in boilers have caused numerous water-cooled wall leaks. If this problem is not completely resolved, it will inevitably pose a significant threat to the long-term safe and stable operation of the boiler. Accidents involving water-cooled wall tube leaks due to frequent ash accumulation in the water seal grooves are bound to increase. Replacing the water seal with a dry seal can effectively solve the ash accumulation problem. Replacing the ash curtain, purifying the inlet water source, and optimizing the piping system can effectively control ash accumulation in the water seal grooves. However, these measures cannot completely eliminate the ash accumulation problem in the water seal grooves of the unit. Utility Model Content

[0004] The purpose of this utility model is to provide a boiler bottom water seal component to solve the problem that the steam generated in the water seal tank adsorbs fine ash, thereby aggravating the ash accumulation in the water seal tank.

[0005] To solve the above problems, the present invention adopts the following technical means:

[0006] A boiler bottom water seal assembly includes a water seal insert plate disposed on the water-cooled wall tube of the cold ash hopper. The water seal insert plate extends from the top surface of the water seal trough into the liquid surface of the water seal trough. An ash-blocking mechanism is installed on the inner side of the water seal insert plate. The ash-blocking mechanism is constructed of a flexible steel plate. The bottom side of the flexible steel plate abuts against the inner top surface of the water seal trough. The width of the flexible steel plate is not less than the inner width of the water seal trough.

[0007] Preferably, the dust-blocking mechanism includes a horizontal plate fixedly installed inside the water seal insert plate, and a vertically extending mounting plate is installed at the end of the horizontal plate away from the water seal insert plate, with the flexible steel plate installed at the lower end of the vertically extending mounting plate.

[0008] Furthermore, the flexible steel plate includes a rigid plate with a U-shaped groove at the top, a flexible plate is installed at the bottom of the rigid plate, the vertical mounting plate is embedded and clamped in the U-shaped groove, and after the flexible plate abuts against the water seal groove, it is tilted toward the side away from the water seal insert plate.

[0009] Furthermore, the horizontal ends of the U-shaped groove are provided through, and the width of the U-shaped groove does not exceed the thickness of the vertical mounting plate.

[0010] Furthermore, the rigid plate and the vertical mounting plate are connected by bolts.

[0011] Furthermore, the thickness of the flexible steel plate is 0.5 mm.

[0012] Furthermore, a slag-blocking net is also installed on the water-cooled wall tube of the cold ash hopper. The slag-blocking net is located inside the water seal trough, and a reinforcing baffle is installed inside the slag-blocking net.

[0013] This utility model has the following beneficial effects during use:

[0014] Adding a slanted, flexible steel plate to the water seal trough effectively prevents fly ash from combining with steam in the furnace and falling into the trough, thus avoiding ash buildup and blockage. Simultaneously, it reduces the flow of high-temperature flue gas in this area, lowering the fly ash content in the flue gas. This effectively reduces ash accumulation in the water seal trough. After implementing this device, no new ash accumulation was observed in the water seal trough during operation. After nearly six months of operation, a shutdown inspection revealed that the internal structure of the water seal trough was essentially the same as when it was first installed, with no damp ash accumulation between the baffle plate and the water seal trough. This effectively ensured normal boiler expansion and water seal performance, achieving excellent results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0017] Among them, 1-cold ash hopper water-cooled wall pipe, 2-water seal insert plate, 3-water seal groove, 4-flexible steel plate, 5-horizontal plate, 6-vertical installation plate, 7-U-shaped groove, 8-rigid plate, 9-flexible plate, 10-bolt, 11-slag-blocking net, 12-reinforced baffle. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Please refer to Figure 1 and Figure 2 As shown, a boiler bottom water seal assembly includes a water seal insert plate 2 disposed on a water-cooled wall tube 1 of a cold ash hopper. The water seal insert plate 2 extends from the top surface of a water seal trough 3 into the liquid surface of the water seal trough 3. An ash-blocking mechanism is installed on the inner side of the water seal insert plate 2. The ash-blocking mechanism is constructed with a flexible steel plate 4. The bottom side of the flexible steel plate 4 abuts against the inner top surface of the water seal trough 3. The width of the flexible steel plate 4 is not less than the inner width of the water seal trough 3.

[0025] By adding an inclined flexible steel plate 4 to the water seal trough 3, the fly ash inside the furnace is prevented from combining with the steam in the water seal trough 3 and falling into the trough 3, thus preventing ash blockage. Simultaneously, this reduces the flow of high-temperature flue gas in this area, lowering the fly ash content in the flue gas. This effectively reduces ash accumulation in the water seal trough 3. After implementing the above device, no new ash accumulation was observed in the water seal trough 3 during operation. After nearly six months of operation, a shutdown inspection showed that the internal structure of the water seal trough 3 was essentially the same as when it was first installed, with no damp ash accumulation between the baffle plate and the water seal trough 3. This effectively ensured the normal expansion of the boiler and the water seal effect, achieving excellent results.

[0026] Specifically, the dust-blocking mechanism includes a horizontal plate 5 fixedly installed inside the water seal insert plate 2, and a vertically extending mounting plate 6 is installed at the end of the horizontal plate 5 away from the water seal insert plate 2. The flexible steel plate 4 is installed at the lower end of the vertically extending mounting plate 6.

[0027] In addition, to facilitate the maintenance and replacement of the flexible steel plate 4, the flexible steel plate 4 includes a rigid plate 8 with a U-shaped groove 7 at the top, a flexible plate 9 installed at the bottom of the rigid plate 8, and a vertical mounting plate 6 embedded and clamped in the U-shaped groove 7. After the flexible plate 9 abuts against the water seal groove 3, it tilts towards the side away from the water seal insert plate 2.

[0028] Thus, in this embodiment, the entire flexible steel plate 4 can be disassembled and installed by using the U-shaped groove 7 on the rigid plate 8 and the vertical mounting plate 6 for disassembly and clamping. Moreover, after installation, when the flexible plate 9 comes into contact with the water seal groove 3, the bending deformation of the flexible plate 9 will also cause the rigid plate with the U-shaped groove 7 to tend to tilt, thereby increasing the static friction between the U-shaped groove 7 and the vertical mounting plate 6, thus improving the installation stability of the flexible steel plate 4 in the clamped state.

[0029] Furthermore, the horizontal ends of the U-shaped groove 7 are provided through, and the width of the U-shaped groove 7 does not exceed the thickness of the vertical mounting plate 6.

[0030] Furthermore, in another embodiment, the rigid plate 8 and the vertical mounting plate 6 are detachably connected by bolts 10.

[0031] Furthermore, the thickness of the flexible steel plate 4 is 0.5 mm.

[0032] Meanwhile, a slag-blocking net 11 is also provided on the water-cooled wall pipe 1 of the cold ash hopper. The slag-blocking net 11 is located inside the water seal trough 3, and a reinforcing baffle 12 is installed inside the slag-blocking net 11.

[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 bottom water seal assembly, characterized in that, It includes a water seal plate (2) installed on the water-cooled wall pipe (1) of the cold ash hopper. The water seal plate (2) extends from the top surface of the water seal trough (3) into the liquid surface of the water seal trough (3). An ash-blocking mechanism is installed on the inner side of the water seal plate (2). The ash-blocking mechanism is constructed with a flexible steel plate (4). The bottom side of the flexible steel plate (4) abuts against the inner top surface of the water seal trough (3). The width of the flexible steel plate (4) is not less than the inner width of the water seal trough (3).

2. A boiler bottom water seal assembly according to claim 1, characterized in that, The dust-blocking mechanism includes a horizontal plate (5) fixedly installed inside the water seal insert (2), and a vertically extending mounting plate (6) is installed at the end of the horizontal plate (5) away from the water seal insert (2), and the flexible steel plate (4) is installed at the lower end of the vertically extending mounting plate (6).

3. A boiler bottom water seal assembly according to claim 2, characterized in that, The flexible steel plate (4) includes a rigid plate (8) with a U-shaped groove (7) at the top. A flexible plate (9) is installed at the bottom of the rigid plate (8). The vertical mounting plate (6) is embedded and clamped in the U-shaped groove (7). After the flexible plate (9) abuts against the water seal groove (3), it tilts towards the side away from the water seal insert plate (2).

4. A boiler bottom water seal assembly according to claim 3, characterized in that, The horizontal ends of the U-shaped groove (7) are provided through, and the width of the U-shaped groove (7) does not exceed the thickness of the vertical mounting plate (6).

5. A boiler bottom water seal assembly according to claim 3 or 4, characterized in that, The rigid plate (8) and the vertical mounting plate (6) are detached and connected by bolts (10).

6. A boiler bottom water seal assembly according to claim 1, characterized in that, The thickness of the flexible steel plate (4) is 0.5 mm.

7. A boiler bottom water seal assembly according to claim 1, characterized in that, A slag-blocking net (11) is also provided on the water-cooled wall pipe (1) of the cold ash hopper. The slag-blocking net (11) is located inside the water seal trough (3), and a reinforcing baffle (12) is installed inside the slag-blocking net (11).

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