Fertilizer production coal-fired hot blast furnace slag removal equipment

Abstract

A slag discharge device for a coal-fired hot blast furnace for fertilizer production includes a slag discharge device, a lifting section of the slag discharge device is equipped with a first spray pipe, an upper end of the lifting section is equipped with an exhaust pipe, a lower hopper is equipped with a discharge end of the slag discharge device, and a second spray pipe is also installed on the lifting section of the slag discharge device. The second spray pipe has the same structure as the first spray pipe, and a notch is provided on the side of the lower hopper facing the second spray pipe. The second spray pipe can spray into the lower hopper through the notch, and the first spray pipe and the second spray pipe are respectively connected to a branch pipe, and the branch pipe is connected to a main pipe. The first spray pipe and the second spray pipe can fully extinguish the fire, reduce dust and cool the coal slag, and the smoke in the slag discharge device is discharged to the smoke treatment device in the factory area through the exhaust pipe for treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of slag discharging equipment for fertilizer production, in particular to slag discharging equipment for a coal-fired hot blast furnace for fertilizer production. Background Art

[0002] In the process of fertilizer production, it is necessary to heat the granulator through a coal-fired hot air furnace. The coal-fired hot air furnace currently used by our company is roughly the same as the coal-fired hot air furnace disclosed in CN201392007Y. Figure 1 A slag discharge device 2 is installed at the lower part of the coal-fired hot blast furnace 1. The slag generated in the coal-fired hot blast furnace 1 is scraped into the cart through the chain scraper in the slag discharge device 2.

[0003] When the slag discharge device 2 scrapes out the coal slag, some smoke and dust will overflow from the slag discharge device 2, which will be directly discharged into the factory building, affecting the working environment in the factory building. In addition, there are still particles in the coal slag that are not completely burned. After these particles are gathered in the cart, they still have a large amount of heat, which poses a great safety hazard. The current treatment method is to wet the coal slag in the cart with water before transporting the cart out. Although this method can extinguish the fire, the amount of water spraying needs to be manually controlled, which is very inconvenient and also takes up manpower. In view of the current status quo, it is necessary to improve the current slag discharge device. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to solve the problems existing in the above-mentioned background technology and to provide a slag discharge device for a coal-fired hot blast furnace in fertilizer production, which can extract smoke and dust and spray the coal slag for fire extinguishing and dust reduction in the slag discharge device.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a slag discharging device for a coal-fired hot blast furnace in fertilizer production, including a slag discharging device, a lifting section of the slag discharging device is equipped with a first spray pipe, the upper end of the lifting section is equipped with an exhaust pipe, the discharge end of the slag discharging device is equipped with a lower hopper, and a second spray pipe is also installed on the lifting section of the slag discharging device. The second spray pipe has the same structure as the first spray pipe, and the lower hopper is provided with a notch on one side facing the second spray pipe. The second spray pipe can spray into the lower hopper through the notch, and the first spray pipe and the second spray pipe are respectively connected to branch pipes, and the branch pipes are connected to the main pipe.

[0006] The upper end of the lifting section is provided with a gas collecting hopper, and the exhaust pipe is installed on the gas collecting hopper.

[0007] An exhaust fan is installed on the gas collecting hopper, and an exhaust duct is installed on the exhaust fan.

[0008] A solenoid valve is installed on the main pipe.

[0009] The lower hopper is provided with a guide plate on the upper side of the slot, which is inclined toward a side away from the second spray pipe.

[0010] The first spray pipe includes a spray pipe and a nozzle. One end of the spray pipe is closed and the other end is equipped with a first quick-release joint. A plurality of nut rings are welded on the spray pipe and the nozzle is installed on the nut ring. A plurality of second quick-release joints are installed on the branch pipe. The first quick-release joint and the second quick-release joint are connected by a clamp.

[0011] The first spray pipe is provided with a mounting plate on the side of the spray pipe close to the first quick-release joint, and the spray pipe is connected to the side wall of the slag discharge device through the mounting plate; the spray pipe of the second spray pipe is connected to the side wall of the slag discharge device through a semi-encircling hoop.

[0012] The first spray pipe is provided with two spray pipes, and the nozzles on the two spray pipes are arranged alternately.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model uses the first spray pipe to extinguish fire, reduce dust and cool the surface of the coal slag, and uses the second spray pipe to spray the coal slag again during the process of the coal slag being dispersed and falling, so as to extinguish fire, reduce dust and cool more comprehensively; the smoke in the slag discharge equipment is discharged to the smoke treatment device in the factory area through the exhaust pipe for treatment, which effectively improves the working environment in the factory.

[0015] 2. Install an exhaust fan on the gas collecting hopper and install the exhaust pipe on the exhaust fan to further improve the negative pressure dust collection effect in the slag discharge equipment.

[0016] 3. A solenoid valve is installed on the main pipe. When in use, the solenoid valve is connected to the control system of the slag discharge equipment. The start-up of the solenoid valve is synchronized with the start-up of the motor of the slag discharge equipment, so there is no need for manual intervention in the opening and closing of the first spray pipe and the second spray pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the status of the existing slag discharge equipment.

[0019] Figure 2 It is a schematic diagram of the improved structure of the slag discharging equipment of the utility model.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the slag discharge equipment of the utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the first spray pipe of the utility model.

[0022] Figure 5This is a schematic diagram of the structure of the second spray pipe of the utility model.

[0023] In the figure:

[0024] Coal-fired hot blast furnace 1, slag discharge equipment 2, lifting section 21, lower hopper 22, notch 23, guide plate 24, first spray pipe 3, spray pipe 31, nut ring 32, nozzle 33, first quick-release joint 34, mounting plate 35, second spray pipe 4, semi-encircling hoop 41, branch pipe 5, second quick-release joint 51, main pipe 6, solenoid valve 7, exhaust pipe 8, exhaust fan 81, gas collecting hopper 82. DETAILED DESCRIPTION

[0025] like Figure 2-5 As shown, a slag discharge device for a coal-fired hot blast furnace in fertilizer production includes a slag discharge device 2, a lifting section 21 of the slag discharge device 2 is equipped with a first spray pipe 3, an upper end of the lifting section 21 is equipped with an exhaust pipe 8, a discharge end of the slag discharge device 2 is equipped with a lower hopper 22, and a second spray pipe 4 is also installed on the lifting section 21 of the slag discharge device 2. The second spray pipe 4 has the same structure as the first spray pipe 3, and a notch 23 is provided on the side of the lower hopper 22 facing the second spray pipe 4. The second spray pipe 4 can spray into the lower hopper 22 through the notch 23, and the first spray pipe 3 and the second spray pipe 4 are respectively connected to the branch pipe 5, and the branch pipe 5 is connected to the main pipe 6. The first spray pipe 3 is used to extinguish the fire, reduce dust and cool the surface of the coal slag. Since the first spray pipe 3 sprays on the surface of the coal slag and the coal slag gathers together, there may be an area at the bottom that is not sprayed. Therefore, the second spray pipe 4 sprays the coal slag again during the process of the coal slag dispersing and falling, so as to extinguish the fire more comprehensively. The smoke in the slag discharge device 2 is discharged to the smoke treatment device in the factory area through the exhaust pipe 8.

[0026] When in use, the main pipe 6 is connected to the factory area pressure water pipeline to supply water to the first spray pipe 3 and the second spray pipe 4.

[0027] For further information, see Figure 2 , 3 In order to facilitate the installation of the exhaust pipe 8 and improve the smoke collection effect, a gas collecting hopper 82 is provided at the upper end of the lifting section 21, and the exhaust pipe 8 is installed on the gas collecting hopper 82. The upper end of the gas collecting hopper 82 is adapted to the exhaust pipe 8, and the lower end is the same width as the slag discharge device 2.

[0028] In order to further improve the negative pressure dust suction effect in the slag discharge device 2, an exhaust fan 81 is installed on the air collecting hopper 82, and the exhaust duct 8 is installed on the exhaust fan 81. Preferably, the exhaust fan 81 is a duct axial flow fan.

[0029] In order to facilitate the opening and closing of the first spray pipe 3 and the second spray pipe 4, a solenoid valve 7 is installed on the main pipe 6. The solenoid valve 7 is a normally closed two-position two-way direct-acting solenoid valve. When in use, the solenoid valve 7 is connected to the control system of the slag discharge equipment 2, and the start of the solenoid valve 7 is synchronized with the start of the motor of the slag discharge equipment 2, so that there is no need for manual intervention in the opening and closing of the first spray pipe 3 and the second spray pipe 4.

[0030] See also Figure 3 Since the lower hopper 22 is provided with a slot 23, there is a risk of coal slag flying out of the slot 23. Therefore, the lower hopper 22 is provided with a guide plate 24 on the upper side of the slot 23, which is inclined toward the side away from the second spray pipe 4, so that the wall panel on the lower side of the slot 23 and the guide plate 24 are staggered, thereby preventing coal slag from flying out of the slot 23.

[0031] See also Figure 4 , 5 The first spray pipe 3 and the second spray pipe 4 have the same structure. The first spray pipe 3 includes a spray pipe 31 and a nozzle 33. One end of the spray pipe 31 is closed, and the other end is equipped with a first quick-release joint 34. A plurality of nut rings 32 are welded on the spray pipe 31, and the nozzle 33 is installed on the nut ring 32. A plurality of second quick-release joints 51 are installed on the branch pipe 5, and the first quick-release joint 34 and the second quick-release joint 51 are connected by a clamp. Through the above structure, the installation of the nozzle 33 and the quick connection of the spray pipe 31 and the branch pipe 5 are realized. Specifically, the nozzle 33 adopts a CC-type fan-shaped spray nozzle.

[0032] Specifically, the first spray pipe 3 is provided with a mounting plate 35 on the side of the spray pipe 31 close to the first quick-release joint 34, and the spray pipe 31 is connected to the side wall of the slag discharge device 2 through the mounting plate 35; the spray pipe 31 of the second spray pipe 4 is connected to the side wall of the slag discharge device 2 through a semi-encircling hoop 41. Through the above structure, the first spray pipe 3 and the second spray pipe 4 are fixedly installed.

[0033] For details, see Figure 4 The first spray pipe 3 is provided with two spray pipes 31 , and the nozzles 33 on the two spray pipes 31 are arranged alternately.

[0034] Since only one spray pipe 31 can be installed at the location of the second spray pipe 4, the nozzles 33 on the second spray pipe 4 are relatively dense.

[0035] The action process or principle of the utility model is as follows:

[0036] When the slag discharge device 2 is started, the solenoid valve 7 is energized synchronously, the first spray pipe 3 and the second spray pipe 4 start spraying, the nozzle 33 atomizes the water and sprays it in a fan shape, so that the spraying is more uniform and the moisture is absorbed by the coal slag.

[0037] The first spray pipe 3 extinguishes fire, reduces dust and cools the surface of the coal slag. Since the first spray pipe 3 sprays on the surface of the coal slag and the coal slag gathers together, there may be areas at the bottom that are not sprayed. Therefore, the second spray pipe 4 sprays the coal slag again during the process of the coal slag dispersing and falling, thereby extinguishing the fire more comprehensively.

[0038] The smoke in the slag discharging equipment 2 is discharged through the exhaust pipe 8 to the smoke treatment device in the factory area for purification.

Claims

1. A slag discharge device for a coal-fired hot blast furnace for fertilizer production, comprising a slag discharge device (2), characterized in that: The lifting section (21) of the slag discharge device (2) is provided with a first spray pipe (3), the upper end of the lifting section (21) is provided with an exhaust pipe (8), the discharge end of the slag discharge device (2) is provided with a lower hopper (22), and a second spray pipe (4) is also provided on the lifting section (21) of the slag discharge device (2). The second spray pipe (4) has the same structure as the first spray pipe (3), and a notch (23) is provided on a side of the lower hopper (22) facing the second spray pipe (4). The second spray pipe (4) can spray into the lower hopper (22) through the notch (23). The first spray pipe (3) and the second spray pipe (4) are respectively connected to a branch pipe (5), and the branch pipe (5) is connected to a main pipe (6).

2. The slag discharge equipment for coal-fired hot blast furnace in fertilizer production according to claim 1, characterized in that: An air collecting hopper (82) is provided at the upper end of the lifting section (21), and the exhaust pipe (8) is installed on the air collecting hopper (82).

3. The slag discharge equipment for coal-fired hot blast furnace in fertilizer production according to claim 2, characterized in that: An exhaust fan (81) is mounted on the gas collecting hopper (82), and an exhaust duct (8) is mounted on the exhaust fan (81).

4. The slag discharge equipment for coal-fired hot blast furnace in fertilizer production according to claim 1, characterized in that: A solenoid valve (7) is installed on the main pipe (6).

5. The slag discharge equipment for coal-fired hot blast furnace in fertilizer production according to claim 1, characterized in that: The lower hopper (22) is provided with a guide plate (24) on the upper side of the notch (23) and is inclined towards a side away from the second spray pipe (4).

6. The slag discharge equipment for coal-fired hot blast furnace in fertilizer production according to claim 1, characterized in that: The first spray pipe (3) comprises a spray pipe (31) and a nozzle (33); one end of the spray pipe (31) is closed and the other end is provided with a first quick-release joint (34); a plurality of nut rings (32) are welded to the spray pipe (31); the nozzle (33) is installed on the nut ring (32); a plurality of second quick-release joints (51) are installed on the branch pipe (5); the first quick-release joint (34) and the second quick-release joint (51) are connected via a clamp.

7. The slag discharge equipment for coal-fired hot blast furnace in fertilizer production according to claim 1 or 6, characterized in that: The first spray pipe (3) is provided with a mounting plate (35) on a side of the spray pipe (31) close to the first quick-release joint (34), and the spray pipe (31) is connected to the side wall of the slag discharge device (2) via the mounting plate (35); the spray pipe (31) of the second spray pipe (4) is connected to the side wall of the slag discharge device (2) via a semi-encircling hoop (41).

8. The slag discharge equipment for coal-fired hot blast furnace in fertilizer production according to claim 6, characterized in that: The first spray pipe (3) is provided with two spray pipes (31), and the nozzles (33) on the two spray pipes (31) are arranged in a staggered manner.

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