Air-cooling spiral slag falling pipe

Abstract

The utility model discloses an air-cooled spiral slag falling pipe which comprises a burnout fire grate, a slag leakage hanging plate is arranged on one side of the burnout fire grate, a slag leakage hole is formed in the slag leakage hanging plate, a slag leakage pipe is fixedly installed in the slag leakage hole, a cold air chamber is fixedly installed at the bottom of the slag leakage hanging plate, one end of the slag leakage pipe penetrates through the cold air chamber, and the other end of the slag leakage pipe penetrates through the cold air chamber. A slag leakage inner pipe is installed at the end, located in the cold air chamber, of the slag leakage pipe, the slag leakage pipe is communicated with the slag leakage inner pipe, the bottom of the slag leakage inner pipe penetrates through the cold air chamber, and a cold air plate is fixedly installed on the slag leakage hanging plate. The slag leakage inner pipe is arranged on the outlet of the slag leakage hanging plate, so that the situation that excessive ash is accumulated on the slag leakage hanging plate, and consequently the working efficiency of the whole ash treatment system is affected is avoided, the slag leakage inner pipe is arranged on the outlet of the slag leakage hanging plate, fly ash in a boiler flue is prevented from entering a hearth, the fly ash amount in the flue is reduced, the fly ash generation rate of the boiler is reduced, and meanwhile the consumption of slaked lime is reduced.

Description

Technical Field

[0001] The utility model relates to the field of slag dropping pipes, in particular to an air-cooled spiral slag dropping pipe. Background Art

[0002] With the continuous improvement of energy efficiency and environmental protection requirements in industrial production, boilers have been widely used due to their high combustion efficiency, ability to handle a variety of fuels and low pollution emissions. During the operation of the boiler, the ash produced by combustion needs to be discharged and cooled in a timely and effective manner to ensure the normal operation of the boiler and improve energy efficiency.

[0003] In the existing technology, boilers use air-cooled spiral slag dropping pipes to quickly cool high-temperature ash and realize continuous transportation of ash, thereby improving the efficiency and stability of slag discharge. For example, in some large thermal power plants, advanced air-cooled spiral slag dropping pipe technology is used to effectively reduce the ash temperature and reduce damage to subsequent transportation and processing equipment. However, due to long-term high-temperature operation, the flue hanging pipes are severely coked, and the number of forced shutdowns increases. In addition, excessive ash accumulation on the slag hanging plate machine will increase the running resistance of the scraper, causing the hanging plate machine to slow down its transportation speed and even jam, thereby affecting the working efficiency of the entire ash handling system.

[0004] Therefore, it is necessary to propose an air-cooled spiral slag removal pipe to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide an air-cooled spiral slag dropping pipe to solve the problem that due to long-term high-temperature operation, the flue hanging pipe is seriously coked and the number of forced shutdowns increases. In addition, excessive ash accumulation on the slag hanging machine will increase the running resistance of the scraper, causing the conveying speed of the hanging machine to slow down and even jam, thereby affecting the working efficiency of the entire ash treatment system.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The top of the cooling air filter is installed at the bottom of the cooling air filter, and the cooling air filter is installed at the bottom of the cooling air filter, and the cooling air filter is installed at the bottom of the cooling air filter.

[0008] Preferably, an expansion joint is fixedly installed on the outside of the inner slag leakage pipe near the top, an outer slag leakage pipe is fixedly installed on the outside of the expansion joint, and the bottom of the outer slag leakage pipe is communicated with the cold air chamber.

[0009] Preferably, an inner tube cavity is provided inside the leakage slag inner tube, and buffer fins are fixedly installed on both sides of the inner wall of the leakage slag inner tube. The buffer fins are arranged on the inner tube cavity with a downward inclination, and the buffer fin array is arranged on the inner tube cavity.

[0010] Preferably, a cooling air cavity is provided between the inner slag leakage tube and the outer slag leakage tube.

[0011] Preferably, a vent is provided near the top of the slag leakage outer tube, the vent array is provided on the slag leakage outer tube, and the vent is communicated with the cooling air cavity.

[0012] Preferably, a grate metal bar is fixedly mounted on the burnout grate, and there are multiple grate metal bars, and the grate metal bar array is arranged on the burnout grate.

[0013] The technical effects and advantages of this utility model are:

[0014] In the present invention, when the boiler is working, the external air cooling equipment blows cold air into the cold air chamber, and the cold air enters the slag hanging plate through the opening at the bottom of the cold air plate and the inclined air port in turn, so that the ash around the slag leakage hole falls into the slag leakage inner tube, avoiding excessive ash accumulation on the slag hanging plate, reducing the running resistance of the slag hanging plate machine scraper, causing the conveying speed of the slag hanging plate machine to slow down, thereby affecting the working efficiency of the entire ash handling system. Since the cold air in the cold air chamber enters the boiler through the cold air plate, the working efficiency of the boiler is improved, and the fuel combustion is more complete; by arranging the slag leakage inner tube on the outlet of the slag hanging plate, the boiler flue fly ash is avoided from entering the furnace, the flue fly ash amount is reduced, the boiler fly ash generation rate is reduced, and the consumption of slaked lime is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an air-cooled spiral slag dropping pipe of the utility model.

[0016] Figure 2 For this utility model Figure 1 Enlarged structural diagram.

[0017] Figure 3 This is a schematic diagram of the cooling air cavity structure of the utility model.

[0018] Figure 4 This is a schematic diagram of the internal structure of the slag leakage inner tube of the utility model.

[0019] In the figure: 1. Burnout grate; 2. Cold air chamber; 3. Slag leakage hanging plate; 4. Slag leakage hole; 5. Slag leakage pipe; 6. Cold air plate; 7. Inclined air outlet; 8. Slag leakage inner pipe; 9. Slag leakage outer pipe; 10. Ventilation port; 11. Buffer fin; 12. Expansion joint; 13. Cooling air cavity; 14. Inner pipe cavity; 15. Grate metal strip. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The utility model provides Figure 1-Figure 4The air-cooled spiral slag dropping pipe shown in the figure includes a burnout grate 1, which is characterized in that: a slag leakage hanging plate 3 is provided on one side of the burnout grate 1, and a slag leakage hole 4 is provided on the slag leakage hanging plate 3. There are multiple slag leakage holes 4, and the top of the slag leakage hole 4 is on the same horizontal line as the top of the slag leakage hanging plate 3. The slag leakage holes 4 are arranged in an array on the slag leakage hanging plate 3. A slag leakage pipe 5 is fixedly installed inside the slag leakage hole 4. A cold air chamber 2 is fixedly installed at the bottom of the slag leakage hanging plate 3, and one end of the slag leakage pipe 5 passes through the cold air chamber 2. The slag leakage pipe 5 is located at one end of the cold air chamber 2 and is fixedly installed with a slag leakage inner pipe 8. The inner diameter of the slag leakage inner pipe 8 is larger than the inner diameter of the slag leakage pipe 5. The slag leakage pipe 5 and the slag leakage inner pipe 8 are connected to each other. The bottom of the slag leakage inner pipe 8 passes through the cold air chamber 2. A cold air plate 6 is fixedly installed on the slag leakage hanging plate 3. The cold air plate 6 passes through the cold air chamber 2 and the slag leakage hanging plate 3 respectively. The cold air plate 6 is a hollow structure, and the bottom of the cold air plate 6 is open. Inclined air vents 7 are provided on both sides of the cold air plate 6 near the top.

[0022] When the boiler is working, the ash from the burning of the fuel on the burnout grate 1 falls onto the slag leakage hanging plate 3 under the movement of the burnout grate 1, and the ash falls into the slag leakage inner tube 8 through the slag leakage hole 4 and the slag leakage pipe 5 on the slag leakage hanging plate 3. Since the inner diameter of the slag leakage pipe 5 is smaller than the inner diameter of the slag leakage inner tube 8, the ash will not fall to the outside of the slag leakage inner tube 8 during the process of falling into the slag leakage inner tube 8. In this process, the external air cooling equipment blows cold air into the cold air chamber 2, and the cold air enters the slag leakage hanging plate 3 through the opening at the bottom of the cold air plate 6 and the inclined air port 7 in turn. Because the inclined air port 7 is tilted downward, the cold air is blown out from the inclined air port 7, so that the slag leakage The ash around the hole 4 falls into the ash leakage inner tube 8, avoiding excessive ash accumulation on the ash leakage hanging plate 3, reducing the running resistance of the ash leakage hanging plate machine scraper, causing the conveying speed of the ash leakage hanging plate machine to slow down, and even jamming may occur, thereby affecting the working efficiency of the entire ash treatment system. Since the cold air in the cold air chamber 2 enters the boiler through the cold air plate 6, the working efficiency of the boiler is improved, and the fuel combustion is more complete; by arranging the ash leakage inner tube 8 on the outlet of the slag leakage hanging plate 3, the boiler flue fly ash is avoided from entering the furnace, the flue fly ash amount is reduced, the boiler fly ash generation rate is reduced, and the consumption of slaked lime is also reduced.

[0023] An expansion joint 12 is fixedly installed on the outside of the slag leakage inner tube 8 near the top, and a slag leakage outer tube 9 is fixedly installed on the outside of the expansion joint 12. The bottom of the slag leakage outer tube 9 is communicated with the cold air chamber 2. A cooling air cavity 13 is provided between the slag leakage inner tube 8 and the slag leakage outer tube 9. A vent 10 is provided on the slag leakage outer tube 9 near the top. The vent 10 is arranged in an array on the slag leakage outer tube 9, and the vent 10 is communicated with the cooling air cavity 13;

[0024] When the external air cooling equipment blows cold air into the cold air chamber 2, the cold air enters the cooling air cavity 13 through the slag leakage outer pipe 9. During this process, the cold air can absorb the heat of the ash inside the slag leakage inner pipe 8. Then, the cold air that has absorbed the heat of the ash is discharged from the cooling air cavity 13 from the vent 10. Because the temperature of the cold air that absorbs the heat of the ash is much higher than the temperature of the cold air blown into the cold air chamber 2, the cold air that absorbs the heat of the ash rises, and the cold air blown into the cold air chamber 2 sinks, which accelerates the cooling of the ash, thereby achieving rapid cooling of the ash and preventing high-temperature ash from damaging subsequent equipment. At the same time, it also facilitates the transportation and processing of the ash. The expansion joint 12 is set to absorb the thermal expansion or shortening of the slag leakage inner pipe 8 and the slag leakage outer pipe 9, thereby preventing the slag leakage inner pipe 8 and the slag leakage outer pipe 9 from being damaged due to excessive thermal stress.

[0025] An inner tube cavity 14 is provided inside the slag leakage inner tube 8, and buffer fins 11 are fixedly installed on both sides of the inner wall of the slag leakage inner tube 8. The buffer fins 11 are arranged on the inner tube cavity 14 in a downwardly inclined manner, and the buffer fins 11 are arranged in an array on the inner tube cavity 14;

[0026] When the ash slag slides down in the inner tube cavity 14 , the buffer fins 11 can buffer the falling speed of the ash slag, thereby increasing the contact time with the cooling air and improving the cooling efficiency.

[0027] The burnout grate 1 is fixedly mounted with a grate metal bar 15. There are multiple grate metal bars 15, and the grate metal bars 15 are arranged in an array on the burnout grate 1.

[0028] Grate metal bars 15 are provided on the burnout grate 1. The grate metal bars 15 can provide a stable support platform for the fuel. The gaps between the grate metal bars 15 are conducive to air circulation, providing sufficient oxygen for the combustion process, thereby improving the combustion efficiency.

[0029] The working principle of the present invention is as follows: when the boiler is working, the ash from the combustion of the fuel on the burnout grate 1 falls onto the slag leakage hanging plate 3 under the movement of the burnout grate 1, and the ash falls into the slag leakage inner tube 8 through the slag leakage hole 4 and the slag leakage pipe 5 on the slag leakage hanging plate 3. Since the inner diameter of the slag leakage pipe 5 is smaller than the inner diameter of the slag leakage inner tube 8, the ash will not fall to the outside of the slag leakage inner tube 8 during the process of falling into the slag leakage inner tube 8. During this process, the external air cooling device blows cold air into the cold air chamber 2, and the cold air sequentially passes through the opening at the bottom of the cold air plate 6 and the inclined air port 7 and enters the slag leakage hanging plate 3. Because the inclined air port 7 is tilted downward, the cold air blows out from the inclined air port 7. Out, the ash around the slag leakage hole 4 falls into the slag leakage inner tube 8, avoiding excessive ash accumulation on the slag leakage hanging plate 3, reducing the running resistance of the slag leakage hanging plate machine scraper, causing the conveying speed of the slag leakage hanging plate machine to slow down, and even jamming may occur, thereby affecting the working efficiency of the entire ash treatment system. Since the cold air in the cold air chamber 2 enters the boiler through the cold air plate 6, the working efficiency of the boiler is improved, and the fuel combustion is more complete; by arranging the slag leakage inner tube 8 on the outlet of the slag leakage hanging plate 3, the boiler flue fly ash is avoided from entering the furnace, the flue fly ash amount is reduced, the boiler fly ash generation rate is reduced, and the consumption of slaked lime is also reduced.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. An air-cooled spiral slag dropping pipe, comprising a burnout grate (1), characterized in that: A slag leakage hanging plate (3) is provided on one side of the burnout grate (1), and a slag leakage hole (4) is provided on the slag leakage hanging plate (3). There are a plurality of slag leakage holes (4), and the tops of the slag leakage holes (4) are on the same horizontal line as the top of the slag leakage hanging plate (3). The slag leakage holes (4) are arranged in an array on the slag leakage hanging plate (3). A slag leakage pipe (5) is fixedly installed inside the slag leakage hole (4). A cold air chamber (2) is fixedly installed at the bottom of the slag leakage hanging plate (3). One end of the slag leakage pipe (5) passes through the cold air chamber (2). The slag leakage pipe (5) is located in the cold air chamber (2). A slag leakage inner tube (8) is fixedly mounted on one end of the slag leakage inner tube (8), the inner diameter of the slag leakage inner tube (8) is larger than the inner diameter of the slag leakage tube (5), the slag leakage tube (5) and the slag leakage inner tube (8) are communicated with each other, the bottom of the slag leakage inner tube (8) passes through the cold air chamber (2), a cold air plate (6) is fixedly mounted on the slag leakage hanging plate (3), the cold air plate (6) passes through the cold air chamber (2) and the slag leakage hanging plate (3), the cold air plate (6) is a hollow structure, and the bottom of the cold air plate (6) is open, and inclined air outlets (7) are provided on both sides of the cold air plate (6) near the top.

2. The air-cooled spiral slag dropping pipe according to claim 1, characterized in that: An expansion joint (12) is fixedly installed on the outside of the slag leakage inner tube (8) near the top, and a slag leakage outer tube (9) is fixedly installed on the outside of the expansion joint (12). The bottom of the slag leakage outer tube (9) is communicated with the cold air chamber (2).

3. The air-cooled spiral slag dropping pipe according to claim 1, characterized in that: An inner tube cavity (14) is provided inside the slag leakage inner tube (8), and buffer fins (11) are fixedly installed on both sides of the inner wall of the slag leakage inner tube (8), and the buffer fins (11) are arranged on the inner tube cavity (14) in a downwardly inclined manner. The buffer fins (11) are arranged in an array on the inner tube cavity (14).

4. The air-cooled spiral slag dropping pipe according to claim 1, characterized in that: A cooling air cavity (13) is provided between the inner slag leakage tube (8) and the outer slag leakage tube (9).

5. The air-cooled spiral slag dropping pipe according to claim 2, characterized in that: A vent (10) is provided near the top of the slag leakage outer tube (9), and an array of the vents (10) is provided on the slag leakage outer tube (9). The vents (10) are communicated with the cooling air cavity (13).

6. The air-cooled spiral slag dropping pipe according to claim 1, characterized in that: A grate metal bar (15) is fixedly mounted on the burnout grate (1), and there are a plurality of grate metal bars (15). The grate metal bars (15) are arranged in an array on the burnout grate (1).

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