JP7758941B2 - Coke oven combustion chamber foreign object crushing device - Google Patents

Description

The present invention relates to a foreign object crushing device that crushes foreign objects hanging or accumulated in the combustion chamber of a coke oven.

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 approximately 10 meters long through the top opening of the coke oven combustion chamber and manually crushing them. However, because the iron pipes are subject to heat damage in the coke oven combustion chamber, which is 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 manually crushed cannot be removed by suction.

Meanwhile, Patent Document 1 discloses a foreign object crushing device that has a hammering section or a power-rotating scraping section at the tip of a water-cooled lance for crushing foreign objects. However, in this foreign object crushing device, the crushing tools, such as the hammering section and scraping section, 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.

JP 2014-055228 A

The problem that this invention aims to solve is to provide a foreign object crushing device for crushing foreign objects that are hanging or accumulated in the combustion chamber of a coke oven, which minimizes damage to the crushing tools and requires less frequent replacement.

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 tube provided at the tip side of the partition wall, and a lid provided at the tip of the outer tube .
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.
3. The apparatus for crushing foreign objects in a coke oven combustion chamber according to claim 1 or 2, wherein the crushing tool body is driven by compressed air and has a compressed air exhaust port at a tip end of the crushing tool body.
4.
4. The apparatus for crushing foreign objects in a coke oven combustion chamber according to any one of claims 1 to 3 , wherein the crushing tool body is an air hammer.

With the foreign object crushing device of the present invention, the main body of the crushing tool, i.e., the crushing tool body, is cooled within a water-cooled jacket, which reduces damage to the crushing tool and reduces the frequency of replacement. This improves workability and reduces costs.

1 is a longitudinal sectional view of a foreign object crushing device according to an embodiment of the present invention; FIG. 2 is a left side view of the foreign object crushing device shown in FIG. 1 . FIG. 2 is a right side view of the foreign object crushing device shown in FIG. 1 .

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.
1, the left side is the front end of the foreign matter removal device 1 and the right side is the rear end, and when in use it is used in a nearly vertical position with the left side facing downwards. Also, since the foreign matter removal device 1 is actually nearly 10 m long, the middle part of the water-cooled lance 2 is not shown in FIG.

The water-cooled lance 2 consists of a stainless steel cylinder 21, which contains a metal water supply pipe 22 and a compressed air supply pipe 23 inside. There is also a partition wall 31 at the tip of the water-cooled lance 2, and the area from the partition wall 31 to the tip forms a water-cooled jacket 3.

The water-cooled jacket 3 is made of stainless steel and consists of a partition wall 31, a cylindrical outer tube 32 attached to the tip of the partition wall 31, and a lid 33 attached to the tip of the outer tube 32. The lid 33 has a cylindrical inner tube 331 in its center. The connections are secured by welding or sealed with an O-ring to prevent cooling water leakage.

The cylindrical air hammer 41 is held inside the inner tube 331 via an O-ring (not shown), with the tip end closer to the center. This prevents cooling water from leaking from the gap between the inner tube 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, where the compressed air supply pipe 23 is connected to the compressed air inlet 412 of the air hammer 41. Because the air hammer 41 comes into direct contact with the cooling water, sealing is applied in the necessary places to prevent water from entering.

Meanwhile, 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, from which compressed air is exhausted. Furthermore, drainage holes 311 are provided in the partition wall 31. There are four drainage holes 311, including one not shown in Figure 1. 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.

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 the temperature during use can be kept extremely low. This means that there is almost no damage due to heat, and the lifespan is long. 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.

Compressed air is supplied to the air hammer 41 through the compressed air supply pipe 23, driving it. The compressed air that drives the air hammer 41 is then discharged from the exhaust port 413 on the tip of the air hammer 41, cooling the chisel 42, foreign matter, and their surroundings. In this way, the compressed air cools the chisel 44, foreign matter, and their surroundings, thereby reducing damage to the chisel 44 due to heat and extending its lifespan.

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.

REFERENCE SIGNS LIST 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-cooled jacket 31 Partition wall 311 Drain hole 32 Outer pipe 33 Lid 331 Inner pipe 4 Crushing tool 41 Air hammer (crushing tool body)
411 Rear part of air hammer 412 Compressed air inlet 413 Exhaust port 42 Chisel (tip tool)

Claims (4)

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. 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. 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. 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.