Coal falling port anti-abrasion device of circulating fluidized bed boiler

Abstract

This utility model relates to an anti-wear device for the coal chute of a circulating fluidized bed boiler, belonging to the field of anti-wear technology for coal chute. The device includes a water-cooled pipe wall, with a coal chute fixedly connected to the inner wall of the water-cooled pipe wall. A rotating shaft is rotatably connected to the front side of the inner wall of the coal chute. Several flaps are arranged in a circular array on the side wall of the rotating shaft. A buffer mechanism is provided on the rear side of the inner wall of the coal chute. A guiding device is provided at the front end of the coal chute. A fixing device is provided at the front end of the water-cooled pipe wall and at the bottom of the guiding device. By setting the guiding device, the material guide groove on the surface of the guard plate can effectively guide the coal lumps. After the guard plate has been used for a period of time, it can be pulled out of the slot, effectively improving the anti-wear effect on the coal lumps. By setting the fixing device, the overall structural strength of the device is effectively improved, preventing detachment and production disruptions.

Description

Technical Field

[0001] This utility model belongs to the field of anti-wear technology for coal chutes, specifically relating to an anti-wear device for coal chutes in circulating fluidized bed boilers. Background Technology

[0002] The coal chute is an important assembly part of the circulating fluidized bed boiler. The coal chute is composed of coal chute risers and coal chute inclined tubes connected together. It is divided into several parts according to the tonnage of the boiler and is evenly distributed in the dense phase zone of the front water-cooled wall.

[0003] During long-term operation, the water-cooled wall tubes at the coal chute of a boiler are prone to problems such as refractory material detachment, erosion of the water-cooled wall tubes due to the scouring and abrasion of coal particles, resulting in thinning of the tube wall and leakage. These problems seriously affect the safe and stable operation of the boiler. Therefore, those skilled in the art have provided an anti-wear device for the coal chute of a circulating fluidized bed boiler to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to provide a simple and reasonably designed anti-wear device for the coal inlet of a circulating fluidized bed boiler in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A wear-resistant device for a coal chute in a circulating fluidized bed boiler includes a water-cooled tube wall. A coal chute is fixedly connected to the inner wall of the water-cooled tube wall. A rotating shaft is rotatably connected to the front side of the inner wall of the coal chute. Several flaps are arranged in a circular array on the side wall of the rotating shaft. A buffer mechanism is provided on the rear side of the inner wall of the coal chute. A guide device is provided at the front end of the coal chute. A fixing device is provided at the front end of the water-cooled tube wall and at the bottom end of the guide device.

[0007] As a further optimization of this utility model, the buffer mechanism includes a fixed plate fixedly connected to the top of the inner wall of the coal drop opening, a first mounting frame fixedly connected to the middle of the bottom end of the fixed plate, a rotating plate rotatably connected to the rear side of the inner wall of the coal drop opening, a second mounting frame fixedly connected to the rear end of the rotating plate, a sliding rod rotatably connected to the inner wall of the second mounting frame, a spring sleeved on the side wall of the sliding rod, and a sleeve rotatably connected to the inner wall of the first mounting frame slidably sleeved on the rear side wall of the sliding rod.

[0008] As a further optimization of this utility model, the guiding device includes a fixed frame that is fixedly connected to the front end of the coal drop outlet. The fixed frame has slots on both sides of its inner wall near the lower position, and the inner wall of the slots is provided with an anti-wear mechanism.

[0009] As a further optimization of this utility model, the anti-wear mechanism includes a locking block that cooperates with the inner walls of two locking slots, a protective plate is fixedly connected between the two locking blocks, and a guide groove is provided at the top of the protective plate.

[0010] As a further optimization of this utility model, the fixing device includes a cement shell fixedly connected to the front end of the water-cooled pipe wall, and the top end of the cement shell is fixedly connected to the bottom end of the fixing frame. A number of steel bars are provided at the bottom end of the inner wall of the cement shell, a protective mesh is provided in the middle of the cement shell, a number of armor plates are provided at the top end of the protective mesh, and the inner wall of the cement shell is filled with concrete blocks.

[0011] As a further optimization of this utility model, the top of the protective mesh is provided with multiple through holes, and several of the steel bars pass through the through holes at the top of the protective mesh.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. In this utility model, by setting a guiding device, after the coal block falls onto the surface of the guard plate, the material guide groove on the surface of the guard plate can play a good guiding role for the coal block falling. After the guard plate has been used for a period of time, the guard plate can be pulled out from the slot, which effectively improves the anti-wear effect on the coal block.

[0014] 2. In this utility model, by setting a fixing device, a layer of concrete blocks is first filled into the cement shell, a protective mesh is placed in it, and multiple steel bars are inserted into the through holes in the protective mesh. After filling again, a layer of armor is placed into the armor, and the concrete blocks are filled to cover the first layer of armor. Finally, the second layer of armor is inserted into the concrete blocks, and the concrete blocks are allowed to solidify. This can effectively improve the overall structural strength of the device and prevent it from falling off and causing production disruptions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the guiding device and fixing device of this utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of the coal inlet of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the coal inlet of this utility model;

[0019] Figure 5 This is an exploded structural diagram of the guiding device of this utility model;

[0020] Figure 6 This is an exploded structural diagram of the fixing device of this utility model.

[0021] In the diagram: 1. Guiding device; 101. Fixing frame; 102. Guard plate; 103. Slot; 104. Material guide chute; 105. Block; 2. Fixing device; 201. Armor; 202. Cement shell; 203. Concrete block; 204. Reinforcing bar; 205. Protective mesh; 3. Water-cooled pipe wall; 4. Rotating shaft; 5. Flip plate; 6. Fixing plate; 7. Rotating plate; 8. Coal drop port; 9. First mounting frame; 10. Sleeve; 11. Slide rod; 12. Spring; 13. Second mounting frame. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Example 1

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a wear-resistant device for the coal chute of a circulating fluidized bed boiler includes a water-cooled tube wall 3, a coal chute 8 fixedly connected to the inner wall of the water-cooled tube wall 3, a rotating shaft 4 rotatably connected to the front side of the inner wall of the coal chute 8, a number of flaps 5 arranged in a circular array on the side wall of the rotating shaft 4, a guide device 1 provided at the front end of the coal chute 8, and a fixing device 2 provided at the front end of the water-cooled tube wall 3 and at the bottom end of the guide device 1.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a fixed plate 6 is fixedly connected to the top of the inner wall of the coal drop outlet 8, and a first mounting bracket 9 is fixedly connected to the middle of the bottom end of the fixed plate 6. A rotating plate 7 is rotatably connected to the rear side of the inner wall of the coal drop outlet 8, and a second mounting bracket 13 is fixedly connected to the rear end of the rotating plate 7. A sliding rod 11 is rotatably connected to the inner wall of the second mounting bracket 13. A spring 12 is sleeved on the side wall of the sliding rod 11, and a sleeve 10 rotatably connected to the inner wall of the first mounting bracket 9 is slidably sleeved on the rear side wall of the sliding rod 11. When the coal block falls into the boiler through the coal drop outlet 8, it first contacts the rotating plate 7. When the coal block contacts the rotating plate 7 to a certain extent, the sliding rod 11 retracts into the sleeve 10, so that the coal block is slowly transported into the coal drop outlet 8. When it contacts the flap 5, the impact force of the coal block moving downward can cause the rotating shaft 4 to rotate, effectively converting the impact force of the falling coal block into the kinetic energy of the rotating shaft 4, reducing the impact on the coal drop outlet and reducing the wear on the coal drop outlet.

[0026] like Figure 2 , Figure 5As shown, a fixed frame 101 is fixedly connected to the front end of the coal inlet 8. The inner walls of the fixed frame 101 are respectively provided with slots 103 on both sides near the bottom. The inner walls of the two slots 103 are fitted with locking blocks 105. A guard plate 102 is fixedly connected between the two locking blocks 105. A guide groove 104 is provided at the top of the guard plate 102. After the coal block falls on the surface of the guard plate 102, the guide groove 104 on the surface of the guard plate 102 can play a good guiding role for the coal block. After the guard plate 102 has been used for a period of time, the guard plate 102 can be pulled out from the slots 103, which effectively improves the anti-wear effect on the coal block.

[0027] like Figure 5 , Figure 6 As shown, a cement shell 202 is fixedly connected to the front end of the water-cooled pipe wall 3, and the top of the cement shell 202 is fixedly connected to the bottom end of the fixing frame 101. Several steel bars 204 are provided at the bottom end of the inner wall of the cement shell 202. A protective mesh 205 is provided in the middle of the cement shell 202. Several armor plates 201 are provided at the top of the protective mesh 205. The inner wall of the cement shell 202 is filled with concrete blocks 203. Multiple through holes are opened at the top of the protective mesh 205, and several steel bars 204 pass through the through holes at the top of the protective mesh 205. A layer of concrete blocks 203 is first filled into the cement shell 202. Both the concrete blocks 203 and the cement shell 202 are concrete structures, which are used to form a good support for the guide device 1. The support, when the guard plate 102 wears out, can use the armor 201 on the top of the concrete block 203 to guide the coal and reduce the wear rate of the coal on the guiding device 1 and the fixing device 2. The protective grid 205 is placed in, and multiple steel bars 204 are inserted into the through holes in the protective grid 205. After filling again, a layer of armor 201 is placed in the armor 201, and the concrete block 203 is filled to cover the first layer of armor 201. Finally, the second layer of armor 201 is inserted into the concrete block 203 and the concrete block 203 is allowed to solidify. This can effectively improve the overall structural strength of the device and prevent it from falling off and causing non-stop production.

[0028] It should be noted that, in the operation of this anti-wear device for the coal chute of a circulating fluidized bed boiler, a layer of concrete blocks 203 is first filled into the cement shell 202, then a protective mesh 205 is placed in, and multiple reinforcing bars 204 are inserted into the through holes in the protective mesh 205. After filling again, a layer of armor 201 is placed into the armor 201, and then the concrete blocks 203 are filled to cover the first layer of armor 201. Finally, the second layer of armor 201 is inserted into the concrete blocks 203, and the concrete blocks 203 are allowed to solidify. Coal blocks fall into the boiler through the coal chute 8, first contacting the rotating plate 7. When a certain amount is reached, the slide bar 11 retracts into the sleeve 10, causing the coal block to be slowly conveyed to the coal drop outlet 8. When it contacts the flap 5, the impact force of the coal block moving downward can cause the rotating shaft 4 to rotate, effectively converting the impact force of the falling coal block into the kinetic energy of the rotating shaft 4, reducing the impact on the coal drop outlet and reducing wear on the coal drop outlet. After the coal block falls onto the surface of the guard plate 102, the guide groove 104 on the surface of the guard plate 102 can play a good guiding role for the coal block falling. After the guard plate 102 has been used for a period of time, the guard plate 102 can be pulled out from the slot 103 to replace the guard plate 102.

[0029] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A wear-resistant device for the coal inlet of a circulating fluidized bed boiler, comprising a water-cooled tube wall (3), characterized in that, The inner wall of the water-cooled pipe wall (3) is fixedly connected to a coal drop port (8). The inner wall of the coal drop port (8) is rotatably connected to a rotating shaft (4) on the front side. The side wall of the rotating shaft (4) has several flaps (5) arranged in a circular array. The inner wall of the coal drop port (8) is provided with a buffer mechanism on the rear side. The front end of the coal drop port (8) is provided with a guide device (1). The front end of the water-cooled pipe wall (3) and the bottom end of the guide device (1) are provided with a fixing device (2).

2. The anti-wear device for the coal chute of a circulating fluidized bed boiler according to claim 1, characterized in that: The buffer mechanism includes a fixed plate (6) fixedly connected to the top of the inner wall of the coal drop port (8), a first mounting bracket (9) fixedly connected to the middle of the bottom end of the fixed plate (6), a rotating plate (7) rotatably connected to the rear side of the inner wall of the coal drop port (8), a second mounting bracket (13) fixedly connected to the rear end of the rotating plate (7), a sliding rod (11) rotatably connected to the inner wall of the second mounting bracket (13), a spring (12) sleeved on the side wall of the sliding rod (11), and a sleeve (10) rotatably connected to the inner wall of the first mounting bracket (9) slidably sleeved on the rear side wall of the sliding rod (11).

3. The anti-wear device for the coal chute of a circulating fluidized bed boiler according to claim 1, characterized in that: The guiding device (1) includes a fixed frame (101) fixedly connected to the front end of the coal drop port (8). The fixed frame (101) has slots (103) on both sides of the inner wall near the lower position. The inner wall of the slots (103) is provided with an anti-wear mechanism.

4. The anti-wear device for the coal chute of a circulating fluidized bed boiler according to claim 3, characterized in that: The wear-resistant mechanism includes a locking block (105) that cooperates with the inner wall of two locking slots (103), and a guard plate (102) is fixedly connected between the two locking blocks (105). A guide groove (104) is provided at the top of the guard plate (102).

5. The anti-wear device for the coal chute of a circulating fluidized bed boiler according to claim 3, characterized in that: The fixing device (2) includes a cement shell (202) fixedly connected to the front end of the water-cooled pipe wall (3), and the top end of the cement shell (202) is fixedly connected to the bottom end of the fixing frame (101). A number of steel bars (204) are provided at the bottom end of the inner wall of the cement shell (202), a protective mesh (205) is provided in the middle of the cement shell (202), a number of armor plates (201) are provided at the top end of the protective mesh (205), and the inner wall of the cement shell (202) is filled with concrete blocks (203).

6. The anti-wear device for the coal chute of a circulating fluidized bed boiler according to claim 5, characterized in that: The protective mesh (205) has multiple through holes at its top, and several of the steel bars (204) pass through the through holes at the top of the protective mesh (205).

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