A screw coal feeder clogging dredging device

Abstract

The utility model discloses a kind of spiral coal feeder plugging dredging device, it is related to spiral coal feeding technical field, including screw conveyor, coal sowing main air pipe and coal sowing auxiliary air pipe;The vertical coal falling pipe is connected in the screw conveyor discharge end, the vertical coal falling pipe lower end is connected with the inclined coal falling pipe, and the inclined coal falling pipe lower end is connected with gasification furnace;The coal sowing main air pipe is connected on the upside of screw conveyor, and its connecting place is vertically corresponding with vertical coal falling pipe;The air inlet end of coal sowing auxiliary air pipe is connected with coal sowing main air pipe, and the air outlet end of coal sowing auxiliary air pipe is connected with the lower end of vertical coal falling pipe, and it is towards inclined coal falling pipe, and flexible pipe section is connected in series on the coal sowing auxiliary air pipe;The utility model can realize smooth spiral coal feeding to gasification furnace, through the action of coal sowing main air pipe and coal sowing auxiliary air pipe respectively with vertical coal falling pipe and inclined coal falling pipe, avoid plugging, make coal falling passage dredge, and then avoid lack of fuel, through flexible pipe section, so that coal sowing auxiliary air pipe can adapt to the thermal expansion and contraction deformation of gasification furnace.

Description

Technical Field

[0001] This utility model relates to the field of spiral coal feeding technology, and in particular to a device for clearing blockages in a spiral coal feeder. Background Technology

[0002] Screw feeding for gasifiers is a process that uses the rotating blades of a screw feeder to continuously and evenly transport coal from the coal storage bin into the gasifier. The rotation of the screw blades generates a pushing force, which can be adjusted according to the needs of the gasification reaction to ensure a stable supply of coal in the furnace. At the same time, a sealing structure prevents gas from escaping from the furnace. In the coal chemical industry, this feeding method is highly efficient and controllable, and it can well meet the requirements of gasifiers for the continuity and stability of raw materials, providing an important material transportation guarantee for the efficient gasification reaction.

[0003] Coal suppliers spray water during coal processing primarily to achieve purposes such as improving conveying performance, controlling dust, and regulating humidity. Specifically, when coal is dry and prone to dust generation during transport, water spraying increases the surface moisture of coal particles, reduces dust emissions, improves the working environment, and lowers the risk of dust explosions. However, if the coal becomes wet and sticky, and the screw feeder is affected by high-temperature gases inside the furnace, blockages can occur during coal transport, leading to insufficient fuel combustion in the boiler. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the problems in the prior art mentioned above, and to provide a device for clearing blockages in a screw feeder.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for clearing blockages in a screw feeder includes a screw conveyor, a main coal-feeding duct, and a secondary coal-feeding duct. The screw conveyor's discharge end is connected to a vertical coal drop pipe, and the lower end of the vertical coal drop pipe is connected to an inclined coal drop pipe, the lower end of which is connected to a gasifier. The main coal-feeding duct is connected to the upper side of the screw conveyor, with its connection point vertically corresponding to the vertical coal drop pipe. The secondary coal-feeding duct's inlet end is connected to the main coal-feeding duct, and its outlet end is connected to the lower end of the vertical coal drop pipe and faces the inclined coal drop pipe. Flexible pipe sections are connected in series on the secondary coal-feeding duct.

[0007] Furthermore, the flexible pipe section is a metal hose, and both ends of the metal hose are connected in series to the coal-bearing auxiliary air duct via flanges.

[0008] Furthermore, a valve is connected in series at the upper part of the vertical coal drop pipe.

[0009] Furthermore, an expansion joint is connected in series at the lower part of the vertical coal chute.

[0010] Furthermore, the main air duct for coal spreading includes a vertical section and a horizontal section. The lower end of the vertical section is connected to an air source, the upper end of the vertical section is connected to the horizontal section, and the end of the horizontal section bends downward and connects to the upper side of the screw conveyor.

[0011] Furthermore, the coal-spreading auxiliary air duct is horizontally arranged, and a section of the air outlet end of the coal-spreading auxiliary air duct is bent downward to form a bent section that connects with the vertical coal drop pipe.

[0012] Furthermore, the outside of the vertical coal drop pipe is provided with a striking assembly for impacting the vertical coal drop pipe. The striking assembly includes a U-shaped seat, a swing rod rotatably connected to the upper side of the U-shaped seat, a torsion spring connected between the swing rod and the U-shaped seat to bring the upper end of the swing rod closer to the vertical coal drop pipe, and a striking rod that contacts the vertical coal drop pipe is provided at the upper end of the swing rod.

[0013] Furthermore, a pad corresponding to the impact rod is provided on the outside of the vertical coal drop pipe.

[0014] Furthermore, the impact rod passes through the upper end of the swing rod, and the upper end of the swing rod is connected to a positioning bolt by a thread, with the inner end of the positioning bolt abutting against the impact rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention enables smooth spiral coal feeding into the gasifier. The main and auxiliary coal feeding ducts act on the vertical and inclined coal drop pipes respectively, preventing material blockage and ensuring unobstructed coal drop channels, thus avoiding fuel shortages. Flexible pipe sections allow the auxiliary coal feeding duct to adapt to the thermal expansion and contraction of the gasifier; expansion joints allow the bolt conveyor and main coal feeding duct to adapt to the thermal expansion and contraction of the gasifier; and impact rods strike the vertical coal drop pipe to assist in unblocking and prevent material blockage. Attached Figure Description

[0017] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a top view of the present invention.

[0020] Figure 4 This is a second-view three-dimensional structural diagram of the present invention.

[0021] Figure 5 This is a schematic diagram of the collision-free state of this utility model.

[0022] Figure 6 This is a schematic diagram of the impact bar and its connection structure of this utility model.

[0023] In the diagram: 1. Screw conveyor; 2. Vertical coal drop pipe; 3. Inclined coal drop pipe; 4. Main coal spreading duct; 5. Secondary coal spreading duct; 6. Flexible pipe section; 7. Support; 8. Valve; 9. Expansion joint; 10. Hammering assembly; 11. Gear motor; 12. Hopper;

[0024] 101. U-shaped seat; 102. Swing rod; 103. Impact rod; 104. Torsion spring; 105. Positioning bolt; 106. Pad; 501. Bending part. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] Specific embodiments of the screw feeder blockage clearing device provided by this utility model:

[0027] Please see Figure 1-6 The screw feeder blockage clearing device includes a screw conveyor 1, a main coal-spreading duct 4, and a secondary coal-spreading duct 5. One end of the screw conveyor 1 is equipped with a geared motor 11 that drives its operation. The screw conveyor 1 has screw blades driven by the geared motor 11. The upper side of the feed end of the screw conveyor 1 is connected to a coal storage hopper 12.

[0028] The screw conveyor 1 is supported by several supports 7 on its lower side. The coal feeding position of the gasifier is located at the top of the gasifier, and a platform is provided around the gasifier, on which the supports 7 are placed.

[0029] The screw conveyor 1 is located on one side of the gasifier. A vertical coal drop pipe 2 is connected to the lower side of the discharge end of the screw conveyor 1. An inclined coal drop pipe 3 is connected to the lower end of the vertical coal drop pipe 2. The lower end of the inclined coal drop pipe 3 is connected to the gasifier and conveys coal to the gasifier.

[0030] A valve 8 is connected in series at the top of the vertical coal drop pipe 2. In this embodiment, the valve 8 is a gate valve, and the valve 8 is driven by a hydraulic cylinder or a pneumatic cylinder.

[0031] A metal expansion joint 9 is connected in series at the lower part of the vertical coal drop pipe 2. The expansion joint 9 can compensate for the thermal expansion and contraction deformation of the gasifier in the vertical direction. The inclined coal drop pipe 3 is connected to the gasifier by welding. The expansion joint 9 can prevent the connection structure from being damaged and leaking due to the thermal expansion and contraction of the gasifier.

[0032] The main coal-feeding duct 4 is connected to the upper side of the screw conveyor 1, and its connection point corresponds vertically to the vertical coal drop pipe 2. The main coal-feeding duct 4 includes a vertical section and a horizontal section. The lower end of the vertical section is equipped with a flange, which connects to the air source pipe. The upper end of the vertical section connects to the horizontal section, and the end of the horizontal section bends downward and connects to the upper side of the screw conveyor 1. The downward bend at the end of the horizontal section changes the airflow direction in the main coal-feeding duct 4 from horizontal to vertically downward. The vertically downward airflow corresponds to the vertical coal drop pipe 2, promoting the falling of coal in the vertical coal drop pipe 2 and preventing the inner coal from clogging the vertical coal drop pipe 2.

[0033] A downward airflow is formed inside the vertical coal drop pipe 2. The airflow passes through the vertical coal drop pipe 2 and forms an inclined downward airflow inside the inclined coal drop pipe 3. This can inhibit the high-temperature gas in the gasifier from entering the inclined coal drop pipe 3 and the vertical coal drop pipe 2, thereby reducing the drying and caking of wet coal and facilitating pipeline unblocking and smooth coal feeding.

[0034] In this embodiment, the main air duct 4 for coal spreading is relatively long. Therefore, the main air duct 4 for coal spreading is divided into several sections, and adjacent sections are connected by flanges.

[0035] The inlet of the auxiliary coal feeding duct 5 is connected to the main coal feeding duct 4, and the outlet of the auxiliary coal feeding duct 5 is connected to the lower end of the vertical coal chuting duct 2 and faces the inclined coal chuting duct 3. The auxiliary coal feeding duct 5 is horizontally arranged, and a section of the outlet of the auxiliary coal feeding duct 5 is bent downward to form a bend 501 that connects to the vertical coal chuting duct 2. The inclination of the bend 501 is not less than the inclination of the inclined coal chuting duct 3, that is, the angle between the center line of the bend 501 and the horizontal plane is not less than the angle between the center line of the inclined coal chuting duct 3 and the horizontal plane. This allows the airflow output from the bend 501 to flow close to the lower wall of the inclined coal chuting duct 3, reducing the contact adhesion between the coal and the lower wall of the inclined coal chuting duct 3, clearing the coal flowing in the inclined coal chuting duct 3, promoting smooth coal feeding, and preventing coal from drying out and clogging the pipe.

[0036] A flexible pipe section 6, which is a metal hose, is connected in series with the coal feeding auxiliary air duct 5. The two ends of the metal hose are connected in series with flanges to the coal feeding auxiliary air duct 5. The metal hose can compensate for the thermal expansion and contraction deformation of the gasifier in the lateral direction. Since the bend 501 is welded to the lower end of the vertical coal drop pipe 2, damage and leakage of the connection structure due to the thermal expansion and contraction of the gasifier can be avoided. Simultaneously, with the deformation of the expansion joint 9, the metal hose can adapt to the deformation, changing the original horizontal state of the coal feeding auxiliary air duct 5 and accommodating the vertical thermal expansion and contraction deformation of the gasifier. Therefore, the metal hose connected in series with flanges to the coal feeding auxiliary air duct 5 allows the coal feeding auxiliary air duct 5 to adapt to the vertical and lateral thermal expansion and contraction deformation of the gasifier.

[0037] A striking assembly 10 for impacting the vertical coal drop pipe 2 is provided on the outside of the vertical coal drop pipe 2. In this embodiment, three sets of striking assemblies 10 are provided. In some embodiments, the number can be increased or decreased according to the site conditions. The striking assembly 10 includes a U-shaped seat 101, which is set on the platform. A swing rod 102 is rotatably connected to the upper side of the U-shaped seat 101. A rotating shaft is connected to the lower end of the swing rod 102. The rotating shaft is rotatably connected to the U-shaped seat 101. A torsion spring 104 is connected between the swing rod 102 and the U-shaped seat 101 to bring the upper end of the swing rod 102 closer to the vertical coal drop pipe 2. The torsion spring 104 is located outside the rotating shaft. A striking rod 103 that contacts the vertical coal drop pipe 2 is provided at the upper end of the swing rod 102.

[0038] To protect the vertical coal chute 2, a pad 106 corresponding to the impact rod 103 is provided on the outside of the vertical coal chute 2. The pad 106 is located between the valve 8 and the expansion joint 9 and is welded to the outside of the vertical coal chute 2 to prevent the vertical coal chute 2 from being damaged or broken due to impact. The impact rod 103 slides through the upper end of the swing rod 102. The upper end of the swing rod 102 is connected to a positioning bolt 105 by a thread. The inner end of the positioning bolt 105 abuts against the impact rod 103. A hand ring is connected to the upper end of the positioning bolt 105. The positioning bolt 105 can be directly rotated through the hand ring to press the impact rod 103 and position it.

[0039] The outer end of the impact rod 103 is pressed down, causing the upper end of the swing rod 102 to move away from the vertical coal drop pipe 2. During this process, the torsion spring 104 deforms and stores energy. The outer end of the impact rod 103 is released, and the torsion spring 104 releases energy, causing the upper end of the swing rod 102 to swing towards the vertical coal drop pipe 2. The inner end of the impact rod 103 strikes the vertical coal drop pipe 2, causing the vertical coal drop pipe 2 and the inclined coal drop pipe 3 to vibrate. The vibration causes the coal inside the pipe wall and the expansion joint 9 to fall off, thus helping to clear the pipe.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clogging clearing device for a screw coal feeder, characterized by, It includes a screw conveyor (1), a main coal-feeding duct (4), and a secondary coal-feeding duct (5); the discharge end of the screw conveyor (1) is connected to a vertical coal drop pipe (2), the lower end of the vertical coal drop pipe (2) is connected to an inclined coal drop pipe (3), and the lower end of the inclined coal drop pipe (3) is connected to the gasifier; the main coal-feeding duct (4) is connected to the upper side of the screw conveyor (1), and its connection point is vertically corresponding to the vertical coal drop pipe (2); the air inlet end of the secondary coal-feeding duct (5) is connected to the main coal-feeding duct (4), the air outlet end of the secondary coal-feeding duct (5) is connected to the lower end of the vertical coal drop pipe (2), and faces the inclined coal drop pipe (3); a flexible pipe section (6) is connected in series on the secondary coal-feeding duct (5).

2. The clogging device according to claim 1, wherein The flexible pipe section (6) is a metal hose, and the two ends of the metal hose are connected in series to the coal-bearing auxiliary air pipe (5) through flanges.

3. The clogging device according to claim 1, wherein A valve (8) is connected in series at the top of the vertical coal drop pipe (2).

4. The clogging device according to claim 1, wherein The lower part of the vertical coal drop pipe (2) is connected in series with an expansion joint (9).

5. The clogging device according to claim 1, wherein The main air duct (4) for coal spreading includes a vertical section and a horizontal section. The lower end of the vertical section is connected to the air source, the upper end of the vertical section is connected to the horizontal section, and the end of the horizontal section bends downward and connects to the upper side of the screw conveyor (1).

6. The clogging device according to claim 1, wherein The coal-spreading auxiliary air duct (5) is set horizontally, and a section of the air outlet end of the coal-spreading auxiliary air duct (5) is bent downward to form a bent section (501) that connects with the vertical coal drop pipe (2).

7. The clogging device according to claim 1, wherein The vertical coal drop pipe (2) is provided with a striking assembly (10) for impacting the vertical coal drop pipe (2) on the outside. The striking assembly (10) includes a U-shaped seat (101), a swing rod (102) is rotatably connected to the upper side of the U-shaped seat (101), and a torsion spring (104) is connected between the swing rod (102) and the U-shaped seat (101) to bring the upper end of the swing rod (102) closer to the vertical coal drop pipe (2). The upper end of the swing rod (102) is provided with a striking rod (103) that contacts the vertical coal drop pipe (2).

8. The clogging device according to claim 7, wherein The vertical coal drop pipe (2) is provided with a pad (106) on the outside corresponding to the impact rod (103).

9. The clogging device according to claim 7, wherein The impact rod (103) is inserted through the upper end of the swing rod (102), and the upper end of the swing rod (102) is connected to the positioning bolt (105) by a thread. The inner end of the positioning bolt (105) abuts against the impact rod (103).

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