Coke oven combustion chamber foreign object crushing device

Abstract

To provide a foreign matter crusher for crushing a foreign matter hanging on a shelf or accumulated in a combustion chamber of a coke oven, which is capable of suppressing damage to a crushing tool and causing less frequent replacement of the tool.SOLUTION: There is provided a foreign matter crusher 1 for a coke oven combustion chamber comprising: a water-cooled lance 2; a water-cooled jacket 3 provided at a tip of the water-cooled lance 2; a crushing tool main body 41 provided inside the water-cooled jacket 3; and a tip tool 42 provided at a tip of the crushing tool main body 41.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a foreign matter crushing device for crushing foreign matter hanging or accumulated in the combustion chamber of a coke oven. [Background technology]

[0002] Foreign objects can become lodged or accumulate in the combustion chamber of a coke oven, obstructing the flow of heating gas from the bottom hole and hindering the temperature control function. Therefore, to ensure stable operation, it is necessary to remove the foreign objects by suction as needed. In order to suck up the foreign objects with a suction device, they must be crushed into pieces that can be sucked up. Conventionally, this has been done by inserting an iron pipe about 10 meters long through the top opening of the coke oven combustion chamber and manually crushing them. However, because the iron pipe is subject to heat damage in the coke oven combustion chamber at around 1000°C, it is necessary to keep a large number of replacement iron pipes on hand for the crushing work. Furthermore, hard foreign objects that cannot be crushed manually cannot be removed by suction.

[0003] On the other hand, Patent Document 1 discloses a foreign object crushing device in which a hammering section or a power-rotating scraping section for crushing foreign objects is provided at the tip of a water-cooled lance. However, in this foreign object crushing device, the crushing tools, such as the hammering section and scraping section, provided at the tip of the water-cooled lance become very hot, which increases the frequency of replacement due to damage. As a result, there are problems with poor workability and high costs. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-055228 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to provide a foreign object crushing device for crushing foreign objects hanging or accumulated in the combustion chamber of a coke oven, which suppresses damage to the crushing tools and requires less frequent replacement. [Means for solving the problem]

[0006] The gist of the present invention is as follows. 1. The apparatus comprises a water-cooled lance, a water-cooled jacket provided at the tip of the water-cooled lance, a crushing tool body provided in the water-cooled jacket, and a tip tool provided at the tip of the crushing tool body. 、 The water-cooled jacket is composed of a partition wall provided at the tip of the water-cooled lance, an outer pipe provided at the tip side of the partition wall, and a lid provided at the tip of the outer pipe. A device for crushing foreign objects in coke oven combustion chambers. 2. 2. The foreign object crushing device for a coke oven combustion chamber according to claim 1, wherein the crushing tool body is held by the partition wall and the lid. 3. The crushing tool body is driven by compressed air and has an exhaust port for compressed air at the tip side of the crushing tool body. or 2 The foreign object crushing device for a coke oven combustion chamber according to claim 1. 4. The crushing tool body is an air hammer. Any one of the above items 1 to 3 The foreign object crushing device for a coke oven combustion chamber according to claim 1. [Effects of the Invention]

[0007] According to the foreign object crushing device of the present invention, the main body of the crushing tool, i.e., the crushing tool body, is cooled in a water-cooled jacket, so damage to the crushing tool is suppressed and the frequency of replacement is reduced, thereby improving workability and reducing costs. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a longitudinal sectional view of a foreign object crushing device according to an embodiment of the present invention; [Figure 2] FIG. 2 is a left side view of the foreign object crushing device shown in FIG. [Figure 3] FIG. 2 is a right side view of the foreign object crushing device shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Fig. 1 shows a vertical cross section of a foreign object crushing device 1 according to one embodiment of the present invention. Fig. 2 shows a left side view of the foreign object crushing device 1, and Fig. 3 shows a right side view of the foreign object crushing device 1. The foreign object crushing device 1 includes a water-cooled lance 2, a water-cooled jacket 3 attached to the tip of the water-cooled lance 2, and a crushing tool 4. The crushing tool 4 is made up of an air hammer 41 as the crushing tool body, and a chisel 42 as a tip tool attached to the tip of the air hammer 41. In Figure 1, the left side of this foreign matter removal device 1 is the front end and the right side is the rear end, and when in use it is used in an almost vertical position with the left side facing downwards. Also, since this foreign matter removal device 1 is actually nearly 10 m long, the middle part of the water-cooled lance 2 is not shown in Figure 1.

[0010] The water-cooled lance 2 consists of a stainless steel cylinder 21, and inside the cylinder 21 there are a metal water supply pipe 22 and a compressed air supply pipe 23. In addition, there is a partition wall 31 at the tip side of the water-cooled lance 2, and the area from the partition wall 31 to the tip side forms a water-cooled jacket 3.

[0011] The water-cooled jacket 3 is made of stainless steel and consists of a partition wall 31, a cylindrical outer pipe 32 attached to the tip of the partition wall 31, and a lid 33 attached to the tip of the outer pipe 32. The lid 33 has a cylindrical inner pipe 331 in its center. The connection between these is fixed by welding or sealed with an O-ring to prevent cooling water leakage.

[0012] The cylindrical air hammer 41 is held inside the inner pipe 331, with the tip end of the air hammer 41 held in place via an O-ring (not shown). This prevents cooling water from leaking from the gap between the inner pipe 331 and the air hammer 41. The rear end 411 of the air hammer 41 is held in place by screwing it into the partition wall 31, and the compressed air supply pipe 23 is connected to the compressed air inlet 412 of the air hammer 41 at the partition wall 31. Because the air hammer 41 comes into direct contact with the cooling water, sealing is applied to the necessary locations to prevent water from entering.

[0013] On the other hand, the water supply pipe 22 is connected to the partition wall 31 and opens into the water-cooled jacket 3. As shown in Figure 2, the air hammer 41 has four exhaust ports 413 on its tip surface, and compressed air is exhausted from these exhaust ports 413. Furthermore, drainage holes 311 are provided in the partition wall 31. There are four drainage holes 311, including one not shown in Figure 1. Furthermore, the water supply pipe 22 and compressed air supply pipe 23 pass through the cover 25 on the rear end of the water-cooled lance 2, and a drainage pipe 24 is also provided.

[0014] Next, the operation of the foreign object crushing device 1 will be described. The cooling water supplied from the water supply pipe 22 flows into the water-cooled jacket 3 from the tip opening of the water supply pipe 22, circulates within the water-cooled jacket 3, and is discharged from the drain hole 311 in the partition wall 31. Since more than half of the air hammer 41 is in direct contact with the cooling water, it is cooled efficiently, and its temperature during use can be kept extremely low. This means that there is almost no damage from heat, and it has a long lifespan. The cooling water discharged from the discharge hole 311 passes through the water-cooled lance 2, cools the water-cooled lance 2, and is discharged from the drain pipe 24 connected to the cover 25 on the rear end of the water-cooled lance 2.

[0015] Compressed air is supplied to the air hammer 41 through the compressed air supply pipe 23, driving the air hammer 41. The compressed air that has driven the air hammer 41 is discharged from an exhaust port 413 on the tip face of the air hammer 41, cooling the chisel 42, foreign matter, and their surroundings. Because the chisel 44, foreign matter, and their surroundings are cooled by the compressed air in this way, damage to the chisel 44 due to heat is suppressed, and the chisel 44 can have a longer lifespan.

[0016] In this embodiment, the air hammer 41, which is the main body of the crushing tool, uses compressed air as power to move a piston reciprocally within a cylinder, which continuously strikes a chisel 42 attached to the tip of the piston, thereby crushing or chipping off foreign objects. The chisel 42 is detachable, and can be replaced with a new one if damaged. In addition to the air hammer, an air rotary tool such as a drill or a grinder can also be used as the crushing tool body. [Explanation of symbols]

[0017] 1 Foreign object crushing device 2 Water-cooled lance 21 Cylinder 22 Water supply pipe 23 Compressed air supply pipe 24 Drain pipe 25 Lid 3 Water cooling jacket 31 Partition Wall 311 Drain hole 32 Outer tube 33 Lid 331 Inner tube 4. Crushing tools 41 Air hammer (crushing tool body) 411 Rear of Air Hammer 412 Compressed air introduction section 413 Exhaust port 42 Chisel (tip tool)

Claims

1. The apparatus comprises a water-cooled lance, a water-cooled jacket provided at the tip of the water-cooled lance, a crushing tool body provided in the water-cooled jacket, and a tip tool provided at the tip of the crushing tool body, The water-cooled jacket is composed of a partition wall provided at the tip of the water-cooled lance, an outer tube provided at the tip side of the partition wall, and a lid provided at the tip of the outer tube.

2. 2. The apparatus for crushing foreign objects in a coke oven combustion chamber according to claim 1, wherein the crushing tool body is held by the partition wall and the lid.

3. 3. The apparatus for breaking up foreign objects in a coke oven combustion chamber according to claim 1, wherein the breaking up tool body is driven by compressed air and has an exhaust port for compressed air at a tip end of the breaking up tool body.

4. The apparatus for breaking up foreign objects in a coke oven combustion chamber according to any one of claims 1 to 3, wherein the breaking up tool body is an air hammer.

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