A slag conveyer chute with an overflow lip

Abstract

The present application relates to a kind of with overflow lip of slag conveyor water tank, and the slag conveyor water tank includes water tank body and lip, and the lip includes annular first connecting plate and second connecting plate, first connecting plate is horizontal annular, and the outer circle edge of first connecting plate is connected with the opening edge of water tank body, and second connecting plate is vertical annular, and the upper side edge of second connecting plate is connected with the inner circle edge of first connecting plate.Compared with prior art, the present application forms overflow tank structure by setting lip on water tank body and cooperating water level, which can condense most of the water vapor generated by water tank, so that wet hot air condenses back when cooling, significantly reducing the water consumption of slag removal system;At the same time, the lip can also block boiling water splashing to hurt people and pollute the environment, and improve the safety of use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coal-fired power plant boiler ash removal, in particular to a slag conveyer water tank with overflow edge. BACKGROUND

[0002] After the coal powder is combusted in the coal-fired power plant boiler, the slag falls into the slag conveyer water tank through the slag well, and the ash with a temperature of 800 DEG C or above carries a large amount of heat, and causes the local water in the water tank to boil, thereby increasing the water loss of the slag removal system.

[0003] In recent years, with the shortage of power coal supply and the increase of coal price, more and more power plants begin to use lignite and even peat which have poor coalification degree, low calorific value and complex chemical composition, especially with huge water content. The chemical and physical properties of these coal types are quite different from the design coal types used in the initial design of the power plant, which leads to a large number of large-diameter and large slag blocks during combustion, and often causes problems such as clogging of the slag well or splashing of the ash-contaminated water in the slag conveyer water tank to the surrounding ground to pollute the environment, and even burns the nearby staff, which seriously affects the safe and stable operation of the unit. SUMMARY

[0004] The present application aims to overcome the defects of the prior art, and provides a water-saving and safe slag conveyer water tank device for the slag removal system, which is used for boiling water in the condenser water tank and reducing the water loss of the system, and avoids splashing of the ash-contaminated water in the water tank.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A slag conveyer water tank with overflow edge, the slag conveyer water tank comprises a water tank body and a baffle, the baffle comprises a first connecting plate and a second connecting plate, the first connecting plate is a horizontal ring, and the outer edge of the first connecting plate is connected to the opening edge of the water tank body; the second connecting plate is a vertical ring, and the upper edge of the second connecting plate is connected to the inner edge of the first connecting plate.

[0007] In an embodiment of the present application, the lower surface of the first connecting plate is provided with heat exchange fins.

[0008] In an embodiment of the present application, the heat exchange fins comprise a plurality of metal sheets perpendicular to the lower surface of the first connecting plate, and the metal sheets are distributed in a matrix form.

[0009] In an embodiment of the present application, the first connecting plate, the second connecting plate and the heat exchange fins are all metal plates.

[0010] In an embodiment of the present application, the opening of the water tank body is a tapered opening which is outwardly expanded.

[0011] In an embodiment of the present application, the outwardly expanding angle of the tapered opening is 15-45 degrees.

[0012] In an embodiment of the present application, the slag well's slag outlet is inserted into the central region of the second connecting plate, and a gap is left between the slag outlet and the second connecting plate.

[0013] In an embodiment of the present application, the water level in the water tank body is higher than the lowest end of the second connecting plate.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The present application forms an overflow tank structure by setting a baffle on the water tank body to cooperate with the water level, which can condense most of the water vapor generated by the water tank, and make the hot and humid air condense and recover when cooled, thereby significantly reducing the water consumption of the slag removal system; at the same time, the baffle can also prevent boiling water from splashing and causing injury and environmental pollution, thereby improving the safety of use.

[0016] 2. The lower side of the first connecting plate is provided with heat exchange fins, which can improve the heat exchange efficiency, thereby condensing more condensed water and further reducing the water loss of the system.

[0017] 3. The opening of the water tank body is designed as an outwardly expanding tapered opening, which slows down the horizontal rise and fluctuation of the coal slag after entering the water, thereby improving the safety and stability of the water tank during use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of Example 1.

[0019] Figure 2 is a structural schematic view of Example 2.

[0020] Reference signs: 1 - water tank body; 2 - baffle; 21 - first connecting plate; 22 - second connecting plate; 3 - slag well; 4 - heat exchange fins. DETAILED DESCRIPTION

[0021] The present application will be described in detail below in combination with the drawings and specific embodiments. The present embodiment is implemented on the basis of the technical solution of the present application, and gives a detailed implementation manner and specific operation process, but the protection scope of the present application is not limited to the following examples.

[0022] Example 1

[0023] As Figure 1As shown, the present embodiment provides a slag ladle with an overflow edge for connecting with a slag well 3. The slag ladle comprises a ladle body 1 and an edge 2. The opening of the ladle body 1 is an outwardly expanding tapered opening; the edge 2 comprises a first connecting plate 21 and a second connecting plate 22. The first connecting plate 21 is a horizontal ring, and the outer edge of the first connecting plate 21 is connected to the opening edge of the ladle body 1; the second connecting plate 22 is a vertical ring, and the upper edge of the second connecting plate 22 is connected to the inner edge of the first connecting plate 21, and the lower edge is suspended downward. The exit of the slag well 3 is inserted into the central area of the second connecting plate 22, and a gap is left between the exit and the second connecting plate 22. In the present embodiment, the first connecting plate 21 and the second connecting plate 22 are both metal plates with good heat exchange performance. The water surface in the ladle body 1 is required to be higher than the lowermost end of the second connecting plate 22, so that the first connecting plate 21 and the second connecting plate 22 form a closed overflow box structure on the water surface. When the water in the ladle is heated and boiled by the coal slag, most of the water vapor generated in the ladle will be condensed on the first connecting plate 21 and the second connecting plate 22, so that the wet hot air condenses and recovers when it is cooled, significantly reducing the water consumption of the slag removal system; at the same time, the edge 2 can also block the boiling water from splashing and causing harm and pollution to the environment, improving the safety of use. In the present embodiment, the outward expansion angle a of the tapered opening is 15-45 degrees. The design of the outwardly expanding opening can significantly slow down the horizontal rise and fluctuation of the coal slag entering the water, improving the safety and stability of the ladle during use.

[0024] A heat exchange fin 4 is arranged on the lower side of the first connecting plate 21, and the heat exchange fin 4 comprises a plurality of L-shaped metal sheets, one side of the metal sheet is welded to the lower surface of the first connecting plate 21, and the other side is perpendicular to the first connecting plate 21. All the metal sheets are arranged in a matrix form on the lower side of the first connecting plate 21. The heat exchange fin 4 can improve the heat exchange efficiency, thereby condensing more condensed water, further reducing the water loss of the system.

[0025] The working principle of the present embodiment is as follows: when the slag removal system is normally operated, the overflow box structure on the ladle is always in a closed state, the upper part of the overflow box is a gas phase space, and the lower part is connected with the ladle, and the water in the ladle and the water in the overflow box are at the same level. At this time, part of the steam generated by the slag well 3 entering the ladle is exchanged and condensed with the evenly distributed heat exchange fin 4 on the upper part of the overflow box, and this part of the water flows back to the overflow box, thereby achieving a certain water saving effect. In addition, when a large slag block falls, the water splashing and fluctuation caused by the large slag block is also blocked by the upper part of the overflow box and falls back, which not only prevents the waste of slag removal water, but also ensures the operation safety, improves the economy and safety of the slag removal system.

[0026] Embodiment two

[0027] As Figure 2As shown, the basic structure of the embodiment is same as that of the first embodiment, comprising a sink body 1 and a rim 2, the rim 2 comprising a first connecting plate 21 and a second connecting plate 22. The first connecting plate 21 is horizontally annular, and the outer edge of the first connecting plate 21 is connected to the opening edge of the sink body 1; the second connecting plate 22 is vertically annular, and the upper edge of the second connecting plate 22 is connected to the inner edge of the first connecting plate 21, and the lower edge is suspended downward. The difference lies in that the sink body 1 is a traditional straight cylinder. The structure can facilitate the setting of the first connecting plate 21 and the second connecting plate 22 on the existing sink, reduce the cost, be conducive to popularization and use, and be better in practicality.

[0028] The preferred embodiments of the present application are described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations without creative work based on the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A vessel for a slag conveyer having an overflow lip, characterized in that, The slag conveyer water tank comprises a water tank body (1) and a baffle (2), the baffle (2) comprises a first connecting plate (21) and a second connecting plate (22), the first connecting plate (21) is a horizontal ring, the outer edge of the first connecting plate (21) is connected with the opening edge of the water tank body (1), the second connecting plate (22) is a vertical ring, the upper edge of the second connecting plate (22) is connected with the inner edge of the first connecting plate (21); The opening of the water tank body (1) is a tapered opening with an outward expansion; The outward expansion angle of the tapered opening is 15-45 degrees; The water surface in the water tank body (1) is higher than the lowest end of the second connecting plate (22).

2. A vessel according to claim 1 having a spill lip, characterised in that, The lower surface of the first connecting plate (21) is provided with heat exchange fins (4).

3. A vessel according to claim 2, wherein, The heat exchange fins (4) comprise a plurality of metal sheets perpendicular to the lower surface of the first connecting plate (21), and the metal sheets are distributed in a matrix form.

4. A vessel according to claim 2, wherein, The first connecting plate (21), the second connecting plate (22) and the heat exchange fins (4) are all metal plates.

5. A vessel according to claim 1 having a spill lip, characterised in that, The slag outlet of the slag well (3) is inserted into the central area of the second connecting plate (22), and a gap is left between the slag outlet and the second connecting plate (22).

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