CN213119055U - Coal feeding port anti-abrasion device - Google Patents
Coal feeding port anti-abrasion device Download PDFInfo
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- CN213119055U CN213119055U CN202021734448.3U CN202021734448U CN213119055U CN 213119055 U CN213119055 U CN 213119055U CN 202021734448 U CN202021734448 U CN 202021734448U CN 213119055 U CN213119055 U CN 213119055U
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Abstract
The utility model discloses a coal feeding mouth abrasionproof decreases device, include: the coal feeding port and the tongue-shaped plate are arranged below the coal feeding port, a coal sowing air pipe is arranged between the coal feeding port and the tongue-shaped plate, and the coal sowing air pipe and the coal feeding port and the tongue-shaped plate and the coal sowing air pipe are in full-welding connection. The utility model discloses in, redesign coal feeding mouth is broadcast coal wind and is given wind form, refractory material structure, changes original wearing and tearing point, improves refractory material intensity to solve the problem that causes the unit explosion non-stop that coal feeding mouth wearing and tearing and refractory material drop, thereby save maintenance cost and repair time, guarantee unit long-term steady operation.
Description
Technical Field
The utility model relates to a boiler equipment field especially relates to a coal feeding mouth abrasionproof that effectively prevents CFB boiler coal feeding mouth wearing and tearing decreases device.
Background
The Yili power plant coal breakage pipe coal feeding port is a direct-insert integral casting type coal feeding port and is composed of an outer pipe and an inner pipe tongue-shaped plate, the wall thickness of the outer pipe is 20mm, the wall thickness of the inner pipe tongue-shaped plate is 35mm, a tortoise shell net is laid on the upper portion of the tongue-shaped plate, 10mm of refractory material is poured at the same time, the gap between the tongue-shaped plate and the outer pipe is 50mm, coal air is blown obliquely downwards at the lower portion in the operation process, the coal breakage port is seriously abraded, the refractory material below is frequently washed and shed, and the potential safety hazard of water-cooled wall abrasion and pipe explosion.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a coal feeding mouth abrasionproof decreases device for changing the broadcast coal wind amount of wind and direction, strengthening refractory material abrasionproof nature to circulating fluidized bed boiler coal feeding mouth and below refractory material erode and drop frequently among the solution prior art, have the problem of the potential safety hazard of water-cooling wall wearing and tearing explosion pipe.
In order to solve the above problem, the utility model adopts the following technical scheme:
a coal feed port wear prevention device comprising: the coal feeder comprises a coal feeding port and a tongue-shaped plate arranged below the coal feeding port, a coal sowing air pipe is arranged between the coal feeding port and the tongue-shaped plate, and the coal sowing air pipe is in full-welding connection with the coal feeding port and the tongue-shaped plate is in full-welding connection with the coal sowing air pipe.
Optionally, the diameter of the coal-feeding air pipes is 15-25 mm, and the number of the coal-feeding air pipes is 5-10.
Preferably, the diameter of the coal-feeding air pipes is 20mm, and the number of the coal-feeding air pipes is 8.
Optionally, the coal-feeding air pipe is horizontally arranged on the tongue-shaped plate.
Optionally, the coal-feeding air is blown in the horizontal direction through the coal-feeding air pipe.
Optionally, baffles are arranged between the coal feeding air pipe and the coal feeding port and between the tongue-shaped plate and the coal feeding air pipe, and the coal feeding port and the tongue-shaped plate are connected through the baffles in a full-welding mode.
Optionally, the coal-seeding air pipe is a 310S stainless steel pipe; the baffle is made of 310S stainless steel material.
Optionally, the baffle is covered with a first refractory material layer, and the surface of the first refractory material layer is flush with the outlet of the coal-seeding air pipe.
Optionally, the thickness of the first refractory material layer is 20-40 mm, and preferably 30 mm.
Optionally, the coal feeding port anti-abrasion device further comprises a second refractory material layer arranged below the coal feeding port, and the thickness of the second refractory material layer is within a range of 100-200 mm; the width of the second refractory material layer is within the range of 600-800 mm.
Preferably, the thickness of the second refractory layer is 140 mm; the width of the second refractory layer is 700 mm.
Optionally, the coal feeding port wear prevention device further comprises an expansion gap arranged between the lower part of the tongue plate and the second refractory material layer.
The utility model discloses a technical scheme can reach following beneficial effect:
1. the coal feeding port coal-spreading air supply form and the refractory material structure are redesigned by technical innovation, original abrasion points are changed, and the strength of the refractory material is improved, so that the problem that the pipe explosion of the unit is not stopped due to abrasion of the coal feeding port and falling of the refractory material is solved, the overhaul cost and the overhaul time are saved, and the long-term stable operation of the unit is guaranteed.
2. The coal-spreading wind outlet adopts a directional small pipe, which can reduce the wind quantity, reduce the abrasion of the coal-feeding port and avoid the erosion of refractory materials. The directional small pipe is adopted to change the air outlet area of the coal-feeding air, reduce the air quantity, change the air outlet direction of the lower-layer coal-feeding air and blow the coal to the vertical direction of the center of the hearth, so that the direct abrasion of the coal-feeding air to the tongue-shaped plate of the coal-feeding port and the lower fireproof material is directly avoided, and simultaneously, the vortex formed by the meeting of the lower coal-feeding air and the primary air of the hearth moves to the center of the hearth, thereby avoiding the abrasion of the coal-feeding port by the.
3. The wear resistance of the refractory material below the coal feeding port is improved. The high-strength refractory and wear-resistant castable is adopted, so that the wear resistance of the refractory material is effectively improved, and the water-cooled wall wear and tube explosion accidents caused by short-term wear of the refractory material are avoided.
4. An expansion gap is reserved between the coal feeding port and the water-cooled wall, so that the falling of the refractory material with uneven expansion is prevented. The coal feeding port is made of stainless steel, the water wall tube is made of G20, one half of the coal feeding port is in the furnace, the other half of the coal feeding port is out of the furnace, and the coal feeding port is in a coal feeding blowing state for a long time, so that the temperature difference between the inner part and the outer part of the coal feeding port is large, the temperature difference between the inner part and the outer part of the coal feeding port and the temperature difference between the inner part and the outer part of the water wall tube are large, the expansion coefficients are different, and.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a side view of a coal feed port wear prevention device;
FIG. 2 is a front view of the coal feed port wear prevention device;
FIG. 3 is a side view of the installation of a coal feeding duct at the coal feeding port;
FIG. 4 is a front view of the installation of a coal feeding duct at a coal feeding port;
FIG. 5 is a schematic view showing the blowing direction of the coal-feeding air before and after the coal-feeding air outlet at the coal-feeding port is modified;
FIG. 6 is a schematic view showing the expansion gap between the lower part of the tongue-shaped plate and the refractory material;
FIG. 7 is a schematic view showing the covering of the refractory material on the baffle plate portion of the coal feeding port.
Description of reference numerals:
1 coal feeding port
2 tongue type board
3 air duct for spreading coal
4 baffle
5 first refractory layer
6 second refractory layer
7 water-cooled wall
8 hearth wall
9 expansion joint
10 furnace chamber grid plate
a blowing direction of the modified coal-feeding wind
b blowing direction of original coal-feeding wind
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
FIG. 1 is a side view of a coal feed port wear prevention device; FIG. 2 is a front view of the coal feed port wear prevention device; FIG. 3 is a side view of the installation of a coal feeding duct at the coal feeding port; FIG. 4 is a front view of the installation of a coal feeding duct at a coal feeding port; FIG. 5 is a schematic view showing the blowing direction of the coal-feeding air before and after the coal-feeding air outlet at the coal-feeding port is modified; FIG. 6 is a schematic view showing the expansion gap between the lower part of the tongue-shaped plate and the refractory material; FIG. 7 is a schematic view showing the covering of the refractory material on the baffle plate portion of the coal feeding port.
Referring to fig. 1-2, a coal feed port wear prevention device includes: the coal feeding port 1, the tongue-shaped plate 2 and the second fireproof material layer 6 arranged below the coal feeding port 1 are arranged, the coal feeding port 1 is located at the position of 2m of the elevation of the front wall of the hearth, and the tongue-shaped plate 2 is located below the coal feeding port 1 and is connected in a full-length welding mode. The gap between the tongue-shaped plate and the coal feeding port device is a coal-spreading air duct. In the prior art, the air outlet of the coal feeding port coal feeding air is positioned between the tongue-shaped plate and the coal feeding port device, the air outlet is large, and the coal feeding air is directly blown and swept along the gap between the tongue-shaped plate and the coal feeding port device. In this embodiment, as shown in fig. 2 and 3, 8 coal feeding ducts 3 made of 310S stainless steel pipes with a diameter of 20mm and a wall thickness of 3.5mm are provided between the coal feeding port 1 and the tongue-shaped plate 2, and the coal feeding ducts 3 and the coal feeding port 1 and the tongue-shaped plate 2 and the coal feeding ducts 3 are all connected by full welding. 8 coal-feeding air pipes 3 are uniformly and horizontally arranged on the tongue-shaped plate 2, and as shown in figure 3, the hearth wall 8 is arranged at an angle of 107 degrees relative to the horizontal direction.
In the prior art, a fireproof material is fully laid below a coal supply port of a hearth, the thickness of the fireproof material is 70mm, the fireproof material right below the coal supply port is dismantled in the reconstruction, a second fireproof material layer 6 is poured again, and the thickness of the second fireproof material layer 6 is 140 mm; the width of the second layer of refractory material 6 is 700 mm.
As shown in fig. 2 and 4, baffles 4 are arranged between the coal feeding air pipe 3 and the coal feeding port 1 and between the tongue-shaped plate 2 and the coal feeding air pipe 3, and the coal feeding port 1 and the tongue-shaped plate 2 are fully welded through the baffles 4. Wherein, the coal-feeding air pipe 3 is a 310S stainless steel pipe; the baffle 4 is made of 310S stainless steel material. The baffle 4 is covered with a first refractory material layer 5 with the thickness of 30mm, as shown in fig. 7, and the surface of the first refractory material layer 5 is flush with the outlet of the coal-seeding air pipe 3.
As shown in fig. 5, before reconstruction, the coal-feeding wind sweeps along the original sweeping direction b; after transformation, the coal-feeding air is blown and swept along the horizontal direction a relative to the hearth air distribution plate 10 through the coal-feeding air pipe 3.
As shown in fig. 6, the coal feed port wear prevention device further comprises an expansion gap 9 provided between the lower portion of the tongue plate 2 and the second refractory material layer 6.
In this example, the first refractory material layer 5 and the second refractory material layer 6 are both made of refractory material, wherein the refractory material is purchased from a professional manufacturer of Yixing Diamond refractory material and has the index values shown in Table 1.
TABLE 1 recast refractory index values
In this embodiment, the following technical requirements apply:
1. when the second refractory material layer 6 is formed, the original grabbing nails are reserved after the original refractory materials are removed; 2. newly installed nails require welding at the fins; 3. the coal-feeding tuyere is required to be fully welded by adopting a 310S stainless steel material; 4. Full welding is required between the coal-feeding air pipe and the baffle plate; 5. the surface of the first refractory material layer 5 is flush with the outlet of the coal-seeding air pipe 3; 6. as shown in FIG. 2, the first refractory material layer 5 is smoothly transited to the junction of the coal feeding port 1.
In the embodiment, according to the air supply form of the coal supply port 1, a lower coal supply air supply port is redesigned, the coal supply air quantity is reduced, the coal supply air direction is changed, the second refractory material layer 6 is prevented from being blown and damaged by the coal supply air, the coal supply port tongue-shaped plate 2 is prevented from being worn by eddy current formed by the coal supply air and primary air, and meanwhile, gaps between the coal supply air pipe 3 of the coal supply port and the coal supply port are fully welded, so that the second refractory material layer 6 on the side face is prevented from being worn by air leakage and blown and damaged. In order to prevent the second refractory material layer 6 at the lower part of the coal feeding port from being blown and damaged, the water-cooled wall 7 is worn and burst. Meanwhile, the second refractory material layer 6 is made of high-strength wear-resistant castable and is thickened. In addition, in order to solve the expansion difference between the coal feeding port 1 and the water cooling wall 7, an expansion gap 9 is added between the lower part of the tongue-shaped plate 2 and the second refractory material layer 6, so that the refractory material is prevented from falling off due to the expansion coefficient difference.
Example 2
The coal feeding port anti-abrasion device provided in the embodiment 2 is basically the same as the coal feeding port anti-abrasion device provided in the embodiment 1, except that the diameter of the coal sowing air pipes 3 is 15mm, and the number of the coal sowing air pipes 3 is 10; the thickness of the first refractory material layer 5 is 20 mm; the thickness of the second refractory material layer 6 is 200 mm; the width of the second layer of refractory material 6 is 750 mm.
Example 3
The coal feeding port anti-abrasion device provided in the embodiment 3 is basically the same as the coal feeding port anti-abrasion device provided in the embodiment 1, except that the diameter of the coal sowing air pipes 3 is 25mm, and the number of the coal sowing air pipes 3 is 7; the thickness of the first refractory material layer 5 is 40 mm; the thickness of the second refractory material layer 6 is 180 mm; the width of the second layer of refractory material 6 is 800 mm.
Example 4
The coal feeding port anti-abrasion device provided in the embodiment 4 is basically the same as the coal feeding port anti-abrasion device provided in the embodiment 1, except that the diameter of the coal sowing air pipes 3 is 25mm, and the number of the coal sowing air pipes 3 is 5; the thickness of the second refractory material layer 6 is 100 mm; the width of the second layer of refractory material 6 is 600 mm.
Example 5
At present, four CFB boiler coal feeding ports of a Shenhuayili energy finite responsibility company power plant all adopt the coal feeding port anti-abrasion device in the embodiment 1, and the operation condition of boiler equipment at the present stage is good.
The use effect shows that the operation adjustment and the environmental protection parameters of the boiler are not influenced by any structural improvement, the risk of pipe explosion caused by the abrasion of the heating surface due to the abrasion of the coal feeding port and the falling of the refractory material at the lower part of the coal feeding port is greatly reduced, the long-period safe and reliable operation of the boiler is ensured, and the method can be popularized and applied in the abrasion prevention treatment of the coal feeding port of the CFB boiler of the same type.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A coal feed port anti-wear device, comprising: the coal feeder comprises a coal feeding port (1) and a tongue-shaped plate (2) arranged below the coal feeding port (1), wherein a coal-spreading air pipe (3) is arranged between the coal feeding port (1) and the tongue-shaped plate (2), and the coal-spreading air pipe (3) is in full-welding connection with the coal feeding port (1) and the tongue-shaped plate (2) is in full-welding connection with the coal-spreading air pipe (3).
2. The coal feeding port abrasion prevention device according to claim 1, wherein the diameter of the coal feeding air pipe (3) is 15-25 mm, and the number of the coal feeding air pipes (3) is 5-10.
3. The coal feeding port abrasion prevention device according to claim 1, wherein the diameter of the coal feeding air pipe (3) is 20mm, and the number of the coal feeding air pipes (3) is 8.
4. The coal feeding port wear prevention device according to claim 1, characterized in that the coal feeding air pipe (3) is horizontally arranged on the tongue plate (2).
5. The coal-feeding port wear prevention device according to claim 1, characterized in that the coal-feeding air is blown in a horizontal direction by the coal-feeding air pipe (3).
6. The coal feeding port wear prevention device according to claim 1, characterized in that a baffle (4) is arranged between the coal feeding air pipe (3) and the coal feeding port (1) and between the tongue-shaped plate (2) and the coal feeding air pipe (3), and the coal feeding port (1) and the tongue-shaped plate (2) are connected through full welding of the baffle (4).
7. The coal feeding port abrasion prevention device according to claim 6, wherein the coal feeding air pipe (3) is a 310S stainless steel pipe;
the baffle plate (4) is made of 310S stainless steel material.
8. A coal-feeding port wear prevention device according to claim 7, characterized in that the baffle plate (4) is covered with a first refractory material layer (5), and the surface of the first refractory material layer (5) is flush with the outlet of the coal-feeding air pipe (3).
9. The coal feed port wear prevention device according to claim 1, characterized by further comprising a second refractory material layer (6) disposed below the coal feed port (1), the second refractory material layer (6) having a thickness in the range of 100 to 200 mm;
the width of the second refractory material layer (6) is within the range of 600-800 mm.
10. Coal feed port wear prevention device according to claim 9, characterized in that it further comprises an expansion gap (9) provided between the lower part of the tongue plate (2) and the second refractory material layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021734448.3U CN213119055U (en) | 2020-08-19 | 2020-08-19 | Coal feeding port anti-abrasion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021734448.3U CN213119055U (en) | 2020-08-19 | 2020-08-19 | Coal feeding port anti-abrasion device |
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| Publication Number | Publication Date |
|---|---|
| CN213119055U true CN213119055U (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021734448.3U Active CN213119055U (en) | 2020-08-19 | 2020-08-19 | Coal feeding port anti-abrasion device |
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| CN (1) | CN213119055U (en) |
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2020
- 2020-08-19 CN CN202021734448.3U patent/CN213119055U/en active Active
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