Fly ash recycling device for coal economizer

Abstract

The utility model discloses an economizer fly ash recycling device which comprises a vertical shaft, the bottom end of the vertical shaft is fixedly connected with an economizer body, the bottom end of the economizer body is connected with an ash hopper through an ash inlet pipe in a penetrating mode, the bottom end of the ash hopper is fixedly connected with an ash discharging pipe, and an electromagnetic valve is arranged on the ash discharging pipe. The lower end of the ash discharging pipe is fixedly connected with the material pumping end of the bin pump, the material conveying end of the bin pump is communicated with the ash silo through the recycling pipe, and a material scraping mechanism is arranged in the ash hopper. Through cooperation of a frame body, a connecting plate, a first gear, a rotating column, a scraping rod, a double-shaft motor, a second gear and the like, ash adhered to the inner wall of the ash hopper can be scraped and cleaned to avoid accumulation and blockage, then through cooperation of a third gear, a rotating rod and a stirring rod, fly ash can be stirred conveniently during ash discharging, discharging blockage is avoided, and the practicability is high. And smooth discharging is facilitated, and the using effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of economizers, in particular to a fly ash recycling device for economizers. Background Art

[0002] Economizer is an important equipment in large coal-fired boilers. It is installed at the lower part of the flue at the rear of the boiler to recover the waste heat of the exhaust gas. In the overall structure of the boiler, the ash collecting device is often at the rear end of the economizer. The ash collecting device is an essential processing device for the boiler. Pollutants such as furnace ash containing sulfide, a kind of corrosive metal, need to be concentrated before processing, and the concentration point is in the ash collecting device.

[0003] The existing referenceable Chinese utility model patent has a grant announcement number of CN217763496U, which discloses a fly ash recycling device for an economizer. A three-way pipe is connected to the bottom of the silo pump, and the three-way pipe is connected to the furnace and the ash bin respectively. On the one hand, it can solve the problems of long transportation distance, easy clogging and wear of the pipeline, and high material level in the economizer ash hopper; on the other hand, the fly ash is sent to the boiler furnace. For a boiler burning Zhundong coal, the disturbance of the fly ash and the input of low-temperature compressed air can reduce the flue gas temperature at the furnace outlet and relieve the boiler, which has great economic benefits.

[0004] The flue gas generated after coal combustion can easily cause the agglomeration effect of particles, that is, the ash agglomerates will agglomerate into ash blocks under the action of gravity and inertia and enter the economizer ash hopper. The block ash can easily stick to the inner wall of the ash hopper, causing the economizer ash hopper to be blocked, making it inconvenient to unload materials. In addition, the fly ash transported to the inside of the hopper still contains some heat, which cannot be recovered and reused, resulting in heat loss and waste. Therefore, those skilled in the art provide an economizer fly ash recycling device to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to provide a fly ash recycling device for an economizer, so as to solve the problem that the existing fly ash recycling device for an economizer proposed in the above background technology is not convenient for clearing blockage and heat recovery.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An economizer fly ash recycling device, comprising:

[0008] A vertical shaft, the bottom end of which is fixedly connected to an economizer body, the bottom end of which is connected to an ash hopper via an ash inlet pipe, the bottom end of which is fixedly connected to an ash lowering pipe, an electromagnetic valve is provided on the ash lowering pipe, the lower end of which is fixedly connected to a pumping end of a silo pump, the feeding end of the silo pump is connected to an ash bin via a recovery pipe, a scraping mechanism is provided inside the ash hopper, an anti-blocking mechanism is provided inside the ash lowering pipe, and a heat recovery mechanism is provided on the right side of the ash hopper;

[0009] The scraping mechanism comprises: a frame is provided in the middle of the interior of the ash hopper, a group of pillars are fixedly provided at the bottom end of the frame, two groups of the pillars are fixedly provided at the inner bottom end of the ash hopper, a connecting plate is fixedly connected to the middle of the interior of the frame, the top end of the connecting plate is rotatably connected to a first gear through a bearing, the top end of the first gear is fixedly connected to a rotating column, one end of the rotating column extends to the outside of the frame and is fixedly connected to a scraper rod, a double-axis motor is fixedly installed on the left side of the interior of the frame, both output ends of the double-axis motor are fixedly connected to shaft columns, and the output ends of the two shaft columns are fixedly connected to second gears;

[0010] The heat recovery mechanism includes: a water tank is fixedly arranged on the right side of the ash hopper, a smoke inlet pipe is fixedly arranged on the left side of the water tank, one end of the smoke inlet pipe passes through the interior of the ash hopper, the other end of the smoke inlet pipe is fixedly connected to the vortex pipe inside the water tank, the other end of the vortex pipe is fixedly connected to the smoke outlet pipe fixed to the right side wall of the water tank, a water inlet pipe is fixedly arranged on the upper end of the water tank, and a water outlet pipe is fixedly arranged on the lower end of the water tank.

[0011] As a further solution of the utility model: the scraper rod is in contact with the inner wall of the ash hopper.

[0012] As a further solution of the utility model: the anti-blocking mechanism includes: the bottom end of the connecting plate is rotatably connected to the third gear through a bearing, the bottom end of the third gear is fixedly connected to a rotating rod, one end of the rotating rod passes through the outside of the frame and extends to the inside of the lower ash pipe, and the outer surface of the rotating rod is fixedly connected to a group of stirring rods located inside the lower ash pipe.

[0013] As a further solution of the present invention: the two second gears are respectively meshed with the first gear and the third gear.

[0014] As a further solution of the present invention: a group of stirring rods are arranged at equal distances.

[0015] As a further solution of the utility model: a filter is arranged inside the smoke inlet pipe.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model is provided with a scraping mechanism and an anti-blocking mechanism. When in use, through the cooperation among the frame, the connecting plate, the first gear, the rotating column, the scraping rod, the double-axis motor and the second gear, the ash adhering to the inner wall of the ash hopper can be scraped and cleaned to avoid accumulation and blockage. Afterwards, through the cooperation among the third gear, the rotating rod and the stirring rod, the fly ash can be stirred when the ash is discharged to avoid blockage of the material discharge, which is convenient for smooth material discharge and has a good use effect.

[0018] 2. The utility model provides a heat recovery mechanism. The smoke ash entering the ash hopper still contains some heat. Through the cooperation among the water tank, smoke inlet pipe, vortex pipe and smoke outlet pipe, the heat can be recovered and utilized to avoid heat loss and waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a schematic diagram of the overall structure of an economizer fly ash recycling device.

[0020] Figure 2 The present invention is a structural schematic diagram of the connection between the frame and the support of an economizer fly ash recycling device.

[0021] Figure 3 The present invention is a structural schematic diagram of a connection plate of an economizer fly ash recycling device connected to a first gear.

[0022] Figure 4 The present invention is a structural schematic diagram of the connection between a smoke inlet pipe and a vortex pipe of an economizer fly ash recycling device.

[0023] In the figure: 1. shaft; 2. economizer body; 3. ash inlet pipe; 4. ash hopper; 5. ash lowering pipe; 6. silo pump; 7. recovery pipe; 8. ash bin; 9. scraper mechanism; 901. frame; 902. support; 903. connecting plate; 904. first gear; 905. rotating column; 906. scraper rod; 907. double-axis motor; 908. shaft column; 909. second gear; 10. anti-blocking mechanism; 1001. third gear; 1002. rotating rod; 1003. stirring rod; 11. heat recovery mechanism; 1101. water tank; 1102. smoke inlet pipe; 1103. gyro pipe; 1104. smoke outlet pipe; 1105. water inlet pipe; 1106. water outlet pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 to Figure 4 The utility model provides a fly ash recycling device for an economizer, comprising:

[0026] A vertical shaft 1, the bottom end of which is fixedly connected with an economizer body 2, the bottom end of the economizer body 2 is connected with an ash hopper 4 via an ash inlet pipe 3, the bottom end of the ash hopper 4 is fixedly connected with an ash lower pipe 5, the lower ash pipe 5 is provided with an electromagnetic valve, the lower end of the lower ash pipe 5 is fixedly connected with the suction end of a silo pump 6, the delivery end of the silo pump 6 is connected with an ash bin 8 via a recovery pipe 7, a scraping mechanism 9 is provided inside the ash hopper 4, an anti-blocking mechanism 10 is provided inside the lower ash pipe 5, and a heat recovery mechanism 11 is provided on the right side of the ash hopper 4.

[0027] The scraping mechanism 9 includes: a frame 901 is provided in the middle of the ash hopper 4, a group of pillars 902 are fixedly provided at the bottom end of the frame 901, two groups of pillars 902 are fixedly provided at the bottom end of the ash hopper 4, a connecting plate 903 is fixedly connected to the middle of the frame 901, the top end of the connecting plate 903 is rotatably connected to a first gear 904 through a bearing, a rotating column 905 is fixedly connected to the top end of the first gear 904, one end of the rotating column 905 extends to the outside of the frame 901 and is fixedly connected to a scraper rod 906, a double-axis motor 907 is fixedly installed on the left side of the interior of the frame 901, both output ends of the double-axis motor 907 are fixedly connected to shaft columns 908, the output ends of the two shaft columns 908 are fixedly connected to second gears 909, and the scraper rod 906 contacts the inner wall of the ash hopper 4;

[0028] Specifically, the dual-axis motor 907 is started to drive the two shaft columns 908 to rotate, and the second gear 909 above drives the first gear 904 to rotate, and the rotating column 905 rotates accordingly, so that the scraper rod 906 scrapes and cleans the ash adhered to the inner wall of the ash hopper 4.

[0029] The heat recovery mechanism 11 includes: a water tank 1101 is fixedly provided on the right side of the ash hopper 4, a smoke inlet pipe 1102 is fixedly provided on the left side of the water tank 1101, one end of the smoke inlet pipe 1102 is connected to the inside of the ash hopper 4, the other end of the smoke inlet pipe 1102 is fixedly connected to the vortex pipe 1103 inside the water tank 1101, the other end of the vortex pipe 1103 is fixedly connected to the smoke outlet pipe 1104 fixed to the right side wall of the water tank 1101, a water inlet pipe 1105 is fixedly provided on the upper end of the water tank 1101, a water outlet pipe 1106 is fixedly provided on the lower end of the water tank 1101, and a filter is provided inside the smoke inlet pipe 1102;

[0030] Specifically, the fly ash collected in the boiler shaft 1 is transported from the bottom of the shaft 1 to the economizer body 2, and then reaches the ash hopper 4 through the ash inlet pipe 3. The fly ash entering the ash hopper 4 still contains heat, and the filter on the smoke inlet pipe 1102 is used to filter the fly ash. The hot air enters the vortex tube 1103 through the smoke inlet pipe 1102, and water is added to the water tank 1101 through the water inlet pipe 1105. The transported hot air can heat the water in the water tank 1101, and then it is discharged through the smoke outlet pipe 1104, so as to facilitate heat recovery.

[0031] The anti-blocking mechanism 10 includes: the bottom end of the connecting plate 903 is rotatably connected to the third gear 1001 through a bearing, the bottom end of the third gear 1001 is fixedly connected to a rotating rod 1002, one end of the rotating rod 1002 passes through the outside of the frame 901 and extends to the inside of the lower ash pipe 5, the outer surface of the rotating rod 1002 is located inside the lower ash pipe 5 and is fixedly connected to a group of stirring rods 1003, the two second gears 909 are respectively meshed with the first gear 904 and the third gear 1001, and the group of stirring rods 1003 are equidistantly arranged.

[0032] Specifically, when the dual-axis motor 907 is running, the second gear 909 below it drives the third gear 1001 to rotate, and its rotating rod 1002 rotates accordingly, thereby causing a group of stirring rods 1003 to stir the fly ash transported inside the ash lowering pipe 5 to avoid blockage of the lowering material.

[0033] Working principle: When in use, the fly ash collected in the boiler shaft 1 is transported from the bottom of the shaft 1 to the economizer body 2, and then reaches the ash hopper 4 through the ash inlet pipe 3. The ash entering the ash hopper 4 still has heat. The filter on the smoke inlet pipe 1102 is used to filter the ash. The hot air enters the vortex tube 1103 through the smoke inlet pipe 1102, and adds water to the water tank 1101 through the water inlet pipe 1105. The transported hot air can heat the water in the water tank 1101, and then it is discharged through the smoke outlet pipe 1104, which is convenient for heat recovery. When unloading, turn on the electromagnetic on the ash discharge pipe 5. The valve is closed and the bin pump 6 is started to transport the fly ash inside the ash hopper 4 to the ash bin 8 for storage. At the same time, the double-axis motor 907 is started to drive the two shaft columns 908 to rotate, and the second gear 909 above it drives the first gear 904 to rotate, and its rotating column 905 rotates accordingly, so that the scraper rod 906 scrapes and cleans the fly ash adhered to the inner wall of the ash hopper 4. When the double-axis motor 907 is running, the second gear 909 below it drives the third gear 1001 to rotate, and its rotating rod 1002 rotates accordingly, so that a group of stirring rods 1003 stirs the fly ash transported inside the lower ash pipe 5 to avoid blockage of the discharge material.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fly ash recycling device for economizer, characterized in that: include: A vertical shaft (1), the bottom end of the vertical shaft (1) is fixedly connected to an economizer body (2), the bottom end of the economizer body (2) is connected to an ash hopper (4) through an ash inlet pipe (3), the bottom end of the ash hopper (4) is fixedly connected to an ash lowering pipe (5), an electromagnetic valve is provided on the ash lowering pipe (5), the lower end of the ash lowering pipe (5) is fixedly connected to the material extraction end of a silo pump (6), the material delivery end of the silo pump (6) is connected to an ash bin (8) through a recovery pipe (7), a scraping mechanism (9) is provided inside the ash hopper (4), an anti-blocking mechanism (10) is provided inside the ash lowering pipe (5), and a heat recovery mechanism (11) is provided on the right side of the ash hopper (4); The scraping mechanism (9) comprises: a frame (901) is arranged in the middle of the ash hopper (4); a group of pillars (902) are fixedly arranged at the bottom end of the frame (901); two groups of pillars (902) are fixedly arranged at the bottom end of the ash hopper (4); a connecting plate (903) is fixedly connected to the middle of the frame (901); the top end of the connecting plate (903) is rotatably connected to a first gear (904) via a bearing; the top end of the first gear (904) is fixedly connected to a rotating column (905); one end of the rotating column (905) extends to the outside of the frame (901) and is fixedly connected to a scraper rod (906); a double-axis motor (907) is fixedly installed on the left side of the frame (901); both output ends of the double-axis motor (907) are fixedly connected to shaft columns (908); and the output ends of the two shaft columns (908) are fixedly connected to second gears (909); The heat recovery mechanism (11) comprises: a water tank (1101) is fixedly arranged on the right side of the ash hopper (4), a smoke inlet pipe (1102) is fixedly arranged on the left side of the water tank (1101), one end of the smoke inlet pipe (1102) is connected to the inside of the ash hopper (4), the other end of the smoke inlet pipe (1102) is fixedly connected to a vortex pipe (1103) inside the water tank (1101), the other end of the vortex pipe (1103) is fixedly connected to a smoke outlet pipe (1104) fixed to the right side wall of the water tank (1101), a water inlet pipe (1105) is fixedly arranged on the upper end of the water tank (1101), and a water outlet pipe (1106) is fixedly arranged on the lower end of the water tank (1101).

2. The economizer fly ash recycling device according to claim 1, characterized in that: The scraper rod (906) is in contact with the inner wall of the ash hopper (4).

3. The economizer fly ash recycling device according to claim 1, characterized in that: The anti-blocking mechanism (10) comprises: the bottom end of the connecting plate (903) is rotatably connected to a third gear (1001) via a bearing, the bottom end of the third gear (1001) is fixedly connected to a rotating rod (1002), one end of the rotating rod (1002) passes through the outside of the frame (901) and extends to the inside of the lower ash pipe (5), and a group of stirring rods (1003) are fixedly connected to the outer surface of the rotating rod (1002) and located inside the lower ash pipe (5).

4. The economizer fly ash recycling device according to claim 3, characterized in that: The two second gears (909) are respectively meshed with the first gear (904) and the third gear (1001).

5. The economizer fly ash recycling device according to claim 3, characterized in that: A group of stirring rods (1003) are arranged at equal distances.

6. The economizer fly ash recycling device according to claim 1, characterized in that: A filter is provided inside the smoke inlet pipe (1102).

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