WO2009088051A1

WO2009088051A1 - Chamber-oven type coke oven

Info

Publication number: WO2009088051A1
Application number: PCT/JP2009/050162
Authority: WO
Inventors: Michio Tabata; Jun Nakashima; Yoshikuni Ogata
Original assignee: Nippon Steel Corporation
Priority date: 2008-01-10
Filing date: 2009-01-05
Publication date: 2009-07-16
Also published as: JP4308301B2; JP2009161713A

Abstract

Provided is a chamber-oven type coke oven comprising a jumper pipe (13) and a mini-stand pipe (11) for establishing communications between a charging oven (21) and an adjacent oven (22) so as to discharge gases at the time of charging the coke oven with coal, and a water-seal gutter (12) for water-sealing the jumper pipe (13) and the mini-stand pipe (11). The chamber-oven type coke oven is characterized by comprising a seal ring (14) in the inner circumference portion of the jumper pipe tip, and is characterized in that the seal ring (14) can slide in the inner circumference portion of the jumper pipe tip, in that the seal ring (14) has an internal diameter equivalent to or smaller than that of the mini-stand pipe (11), and in that the seal ring (14) has an upper portion shape inclined downward from the outer circumference to the inner circumference.

Description

Memoir room furnace type coke oven technical field

The present invention relates to a chamber furnace type coke oven in which a plurality of carbonization chambers are arranged in parallel, and a chamber furnace that communicates between a charging kiln and an adjacent kiln with a jumper pipe when charging coal into the carbonization chamber. It relates to a type coke oven. Background art

In the chamber-type coke oven, a number of carbonization chambers and combustion chambers are alternately arranged, and coal charged in the carbonization chamber is dry-distilled at a high temperature to produce coke. Figure

Figure 6 shows a cross-sectional view of the coke oven carbonization chamber. The coke oven gas generated during coke dry distillation is discharged from the riser 6 provided in the ceiling 23 of the carbonization chamber 2. Gas is discharged from the riser pipe 6 of each carbonization chamber through the bend section 7 to the drainage pipe 8, which is a collecting pipe. Aqueous water is injected into the bend 7 and coke oven gas is sucked by the ejector effect of the low water injection. Low-pressure low-pressure water and high-pressure low-pressure water are prepared as the low-water system that is injected from the bend section 7. During coal dry distillation, the amount of coke oven gas generated is relatively small, so low pressure water is injected from the bend to suck the coke oven gas.

The raw coal is transported to the upper part of the carbonization chamber by the coal loading car 5 and charged from the charging port 4 provided in the ceiling 23 of the carbonization chamber 2. When coal is charged into a high-temperature coalification chamber, the volatile components contained in the coal volatilize rapidly, generating a large amount of gas. When charging coal, the low water jetted from the bend is switched from low-pressure low-pressure water to high-pressure low-pressure water to increase gas suction. However, a large amount of gas generated when charging coal is injected with high-pressure water. Even if it shoots, it cannot be sucked out only by gas suction from the riser. In the conventional coke oven, gas is sucked by the dust collector 24 of the charcoal truck installed in the coal truck 5, and the gas is sucked from the riser 6 and sucked by the dust collector 24 of the charcoal truck. In recent years, the coking chamber 2 (hereinafter also referred to as “charging furnace 21”) charged with coal and the adjacent carbonizing chamber (hereinafter also referred to as “adjacent kiln 22”) have been collaborated. In the meantime, a method of sucking a large amount of gas generated in the charging furnace 21 only into the dry main 8 through the riser pipes of both the charging furnace 21 and the adjacent furnace 22 has begun to be adopted. For example, A. Winter et. ) It is described in.

A vertical pipe that penetrates the ceiling 23 of each carbonization chamber and protrudes onto the coke oven furnace will be provided. As shown in Fig. 5, this vertical pipe is referred to as “mini-end pipe 11”. The mini standpipe 11 is installed near the end of each carbonization chamber opposite to the riser pipe 6. The mini stand pipes 11 of each carbonization chamber are arranged in a row at the same interval. A jumper pipe 13 that can communicate between the two mini stand pipes in the adjacent carbonization chamber is provided. When coal is charged into one of the many carbonization chambers, the mini standpipe of the carbonization chamber (charging kiln 21) and the mini standpipe of the coking chamber (adjacent kiln Π) connected to it. A jumper pipe 13 communicates with each other. As a result, the charging kiln 21 and the adjacent kiln 22 communicate with each other via the jumper pipe 13. In both the carbonization chambers of the charging furnace 21 and the adjacent furnace 22, high pressure water is injected from the bend section 7 to increase the gas suction amount. As a result, a collection of coal vehicles is added to the coal vehicles as before. Without installing a dust device, a large amount of gas generated when charging coal into the charging kiln can be sucked and discharged from both the charging kiln and the adjacent kiln to the dry mains via their risers. .

In a furnace-type coke oven with a large number of carbonization chambers, the carbonization chamber into which coal is charged is shifted to the next carbonization chamber as the coal-mounted vehicle placed on the coke oven furnace moves. To do. The jumper pipe 13 is provided in the coal-loaded vehicle 5, and the jumper pipe 13 moves in position as the coal-loaded vehicle 5 moves. When the coal-carrying car 5 moves over the charging furnace 2 1 where the coal is charged at a certain point, the jumper pipe 1 3 is adjacent to the charging stand 2 and the mini standpipe Π provided in the charging furnace 2 1 The position is determined so as to communicate with the mini standpipe 1 1 provided in the adjacent kiln 22. At that position, the jumper pipe drive unit 20 provided between the charcoal vehicle 5 and the jumper pipe 1 3 is driven to lower the jumper pipe 1 3, so that the two end portions of the jumper pipe 1 3 Joins the tip of two mini-send pipes. For the carbonization chamber other than the charging kiln and the adjacent kiln to which the jumper pipe is joined, cover the tip of the mini stand pipe 11 with a lid 19. Disclosure of the invention

When the tip of the jumper pipe and the tip of the mini stand pipe are joined, the joint must be sealed and the gas flow inside and outside must be blocked. Normally, sealing is performed with a water seal. As shown in Fig. 7 (a), on the side of the mini stand pipe 1 1 1 is provided a gutter (hereinafter referred to as "water seal 1 2") that goes around the outer periphery of the mini stand pipe. Fill with 1-6 water seal water. Two miniature stand pipes are immersed in the water seal water 16 existing in the two water seal rods 1 2 of the two adjacent mini stand pipes. Water seal between the eve tip and the corresponding jumper pipe tip. Since the tip of the jumper pipe is immersed in a water seal provided on the outer periphery of the mini stand vipe, the inner diameter of the tip of the jumper pipe is larger than the outer diameter of the mini stand pipe.

The coke oven gas generated in the coke oven carbonization chamber contains a large amount of dust and volatile gases. As the coke oven gas flows from the charging kiln to the adjacent kiln via the jumper pipe, dust in the gas accumulates as dust on the wall of the jumper pipe. For water seals, as shown in Fig. 7 (a), dust falls from the gap between the inner circumference of the jumper pipe and the outer circumference of the mini stand pipe, producing a dust flow 31, and water seal 1 Dust 30 will accumulate in 2. In addition, the dust accumulated in the jumper pipe drops from the downward tip of the jumper pipe due to vibration when the jumper pipe is raised, and accumulates in the water seal. As shown in Fig. 7 (b), if the amount of dust 30 in the water seal 1 2 exceeds the limit, the effect of the water seal is lost, and the jumper pipe 1 3 and the mini stand pipe 1 1 As a result, the airtightness between the coke ovens is impaired, dust is generated in the atmosphere around the coke oven, or air is sucked into the carbonization chamber.

An object of the present invention is to provide a chamber-type coke oven that can prevent the accumulation of dust from a water seal and maintain a good water seal. That is, the gist of the present invention is as follows.

(1) In a chamber furnace type coke oven in which a plurality of carbonization chambers 2 are arranged in parallel, a vertical pipe (hereinafter referred to as a “mini standpipe” that protrudes above the coke oven furnace through the ceiling 23 of each carbonization chamber 2 1 1 ”)) and has a rod that circulates around the outer periphery of the mini-stand pipe (hereinafter referred to as“ water-sealed rod 1 2 ”) and communicates between two mini-stand pipes in the adjacent carbonization chamber There are two jumper pipes 1 and 3 By immersing the downward-facing tips in the water seals 16 existing in the water seals 12 of the two adjacent mini-stand pipes 11, the distance between the tip of the mini stand pipe and the corresponding jumper pipe tip The seal ring 14 has a seal ring 14 on the inner periphery of the jumper pipe tip, and the seal ring 14 can slide on the inner periphery of the jumper pipe tip. The inner diameter of the seal stand 14 is equal to or smaller than the inner diameter of the mini standpipe 11, and the upper shape of the seal ring 14 is inclined downward from the outer circumference toward the inner circumference, and the inner circumference of the jumper pipe tip A chamber furnace type coke oven having a seal ring stopper 15 for defining a lower end position at which the seal ring can slide.

(2) When the jumper pipe tip 18 contacts the bottom of the water seal 12, the seal ring upper end position is lower than the lowest position of the jumper pipe tip straight pipe part. 1) A furnace-type coke oven as described in 1).

(3) The chamber coke oven according to (1) or (2) above, wherein the difference between the inner diameter of the tip of the jumper pipe and the outer diameter of the seal ring is 1 to 10 mm.

(4) The jumper pipe 13 is installed on the coal-cooking car 5 of the coke oven so that it can move up and down, and the jumper pipe communicates between the coal stand and the mini stand pipes of the coking chamber adjacent to it. The room furnace type coke oven according to any one of the above (1) to (3), characterized in that

The present invention relates to a mini-stand pipe in a furnace-type coke oven that discharges gas generated during coal charging to a dry main chain by connecting the respective mini-stand pipes penetrating the adjacent carbonization chamber ceiling with jumper pipes. It has a collar (water seal) that goes around the outer periphery of the tip, and a jumper There is a seal ring on the inner periphery of the tip of the eve, and the seal ring can slide on the inner periphery of the tip of the jumper pipe. The inner diameter of the seal ring is equal to or less than the inner diameter of the mini stand pipe. The small and upper shape of the seal ring has an inclination that slopes downward from the outer periphery toward the inner periphery, preventing dust from accumulating in the water seal and preventing the water seal between the mini standpipe and the jumper pipe. It can be held well. Brief Description of Drawings

Fig. 1 is a partial cross-sectional view of a coke oven according to the present invention. (A) is a state in which a jumper pipe is connected to a mini stand pipe, and (b) is a view showing a state in which the jumper pipe is raised from the mini stand pipe. The

Fig. 2 is a partial perspective cross-sectional view of the coke oven of the present invention, where (a) shows a state in which the jumper pipe is connected to the mini stand pipe, and (b) shows a state in which the jumper pipe is raised from the mini stand pipe. is there.

Fig. 3 is a partial cross-sectional view showing the connection between the jumper pipe and the mini stand pipe of the present invention. (A) is a normal connection state, (b) is a state where dust is deposited on a water seal, (c ) Is a diagram showing a situation in which the dust passes in a normal connection state, and (d) is a diagram showing a situation in which the dust passes in a state where the seal ring protrudes from the straight pipe portion of the jumper pipe.

FIG. 4 is a partial cross-sectional view showing a connection portion between the jumper pipe and the mini stand pipe of the present invention.

Figure 5 shows a coke oven with a jumper pipe. (A) is a side cross-sectional view, (b) is a partial cross-sectional view along the B-B arrow, and (c) is ( It is a figure which shows the condition which raised the jumper pipe in b). Fig. 6 shows a conventional coke oven that does not have a jumper pipe.

Fig. 7 is a partial cross-sectional view of a conventional coke oven with a jumper pipe. (A) shows the situation where the dust accumulates on the water seal, and (b) shows the situation where the water seal is broken by the dust. FIG. BEST MODE FOR CARRYING OUT THE INVENTION

The coke oven targeted by the present invention is a chamber furnace type coke oven in which a plurality of coking chambers are arranged in parallel. As shown in FIG. 5, each carbonization chamber 2 has a vertical pipe that penetrates the ceiling 23 of the carbonization chamber 2 and protrudes onto the coke oven furnace. The tip of the vertical pipe is open. This vertical pipe is called “mini stand pipe 1 1”. The mini standpipe 1 1 is usually installed near the end of each carbonization chamber 2 opposite to the riser 6. The mini pipes 1 1 of each coking chamber are arranged in a line in the coking chamber arrangement direction at the same interval.

A jumper pipe that can communicate between two mini stand pipes in adjacent carbonization chambers is provided. The jumper pipes 13 are provided in the charcoal vehicle 5 and can be moved up and down by a jumper pipe driving device 20. As the charcoal vehicle 5 moves, the jumper pipes 13 move in the coke chamber arrangement direction.

When charging coal into one of a number of carbonization chambers, the mini standpipe 1 1 of the carbonization chamber (charging kiln 2 1) and the mini stand of the coking chamber (adjacent kiln 22) connected to it. The pipe 1 1 communicates with the jumper pipe 1 3. As a result, the charging kiln 21 and the adjacent kiln 22 communicate with each other via the jumper pipe 13. And both the carbonization chambers of the charging kiln 21 and the adjacent kiln Π inject high-pressure water from the bend section 7, Increase. As a result, a large amount of gas generated at the time of charging coal into the charging kiln can be transferred from both the charging kiln 21 and the adjacent kiln 22 without installing a charcoal collecting dust collector in the charcoal vehicle. It becomes possible to suck and discharge the dry main 8 through the ascending pipe 6.

When the charcoal vehicle 5 moves over the charging kiln 2 1 to charge coal at a certain point, the jumper pipe 1 3 is a mini stand provided in the charging kiln 2 1 as shown in FIG. 5 (c). The position is determined so that the pipe 11 communicates with the mini stand pipe 11 1 provided in the adjacent kiln 22 adjacent to the charging kiln. By lowering the jumper pipe at that position, as shown in FIG. 5 (b), the two tips of the jumper pipe 13 are joined to the two mini standpipe tips. For the charring chamber other than the charging kiln to which the jumper pipe 13 is joined and the adjacent kiln, the lid 19 is put on the tip of the mini stand pipe.

As shown in Fig. 1 and Fig. 2, the tip of the mini stand pipe has a gutter (hereinafter referred to as "water seal 1 2") that goes around the outer circumference. When the jumper pipe 1 3 is lowered, the downward end of the jumper pipe 1 3 is immersed in the water seal water 1 6 in the mini stand pipe 1 2, and this leads to the tip of the mini stand pipe. It is possible to seal between the part and the corresponding jumper pipe tip. The two ends of the Jiyampa pipe are connected to the charging kiln and the mini standpipe of the adjacent kiln, respectively.

As shown in FIGS. 1 and 2, the feature of the present invention is that a seal ring 14 is provided on the inner peripheral portion of the front end of the jumper pipe. The outer diameter of the seal ring 14 is slightly smaller than the inner diameter of the jumper pipe tip, and the seal ring 14 can slide on the inner periphery of the jumper pipe tip. When the jumper pipe 13 is raised and the joint with the mini stand pipe 11 is removed (Fig. 1 (b), Fig. 2 (b)), the seal line A seal ring stopper 15 is provided on the inner periphery of the jumper pipe tip so that the seal ring 14 can be slid on the inner periphery of the jumper pipe tip so that the groove 14 does not fall from the jumper pipe tip. When the jumper pipe 1 3 is out of contact with the mini-spindle pipe 1 1, the seal ring 14 contacts the seal ring stopper 15 and holds the position.

As shown in FIG. 4, the inner diameter d s of the seal ring 14 is equal to or smaller than the inner diameter dm of the mini pipe 11. When the jumper pipe 1 3 is joined to the tip of the mini stand pipe, the jumper pipe 13 is lowered and the tip of the mini stand pipe 1 1 contacts the lower end of the seal ring 1 4. When the jumper pipe 1 3 is further lowered, the seal ring 1 4 is kept in contact with the second stand pipe 1 1, and the seal ring 1 4 is slid along the inner periphery of the jumper pipe 1 3 as the jumper pipe 1 3 is lowered. Thus, the vertical position of the seal ring 14 is kept constant.

As described above, the inner diameter ds of the seal ring 14 is equal to or smaller than the inner diameter dm of the mini standpipe 11 1, and the upper shape of the seal ring 14 is inclined downward from the outer periphery toward the inner periphery. . When the jumper pipe 1 3 is joined to the mini stand pipe 1 1 of the charging kiln 2 1 and the adjacent kiln 2 2, the space between the inner periphery of the jumper pipe tip and the outer periphery of the mini stand pipe is It is in the state covered from the top by the ring 14. Dust falling along the inner circumference of the jumper pipe toward the water seal 1 2 is blocked by the seal ring 1 4 as shown in Fig. 3 (c), and the mini stand along the slope of the top of the seal ring It falls to the inner circumference side of pipe 1 1. This makes it possible to prevent dust from accumulating in the water seal.

When the jumper pipe 1 3 is connected to the mini stand pipe 1 1, the vertical position of the jumper pipe 1 3 changes depending on the dust accumulation situation in the water seal. If no dashes are deposited in the water seal, As shown in Fig. 3 (a), the tip of the jumper pipe contacts the bottom of the water seal 12. On the other hand, as shown in Fig. 3 (b), if dust 30 is accumulated in the water seal, the tip of the jumper pipe cannot contact the bottom of the water seal and is higher than that. Stop at position. In this way, the stop position of the jumper pipe is not constant, so the relative position of the seal ring (with respect to the jumper pipe) when the jumper pipe is connected to the mini stand pipe is also not constant. When no dust is accumulated in the water seal and the tip of the jumper pipe touches the bottom of the water seal, the seal ring is held at the highest position relative to the jumper pipe. The

The jeep pipe is U-shaped or U-shaped with a V-shaped upper end, and has a function to connect the charging kiln and the mini-standpipe of the adjacent kiln. For this reason, the length of the straight pipe at the tip of the jumper pipe is not so long. As shown above, when the tip of the jumper pipe contacts the bottom of the water seal, as shown in Fig. 3 (d), the seal ring upper end position 25 is the lowest position of the straight pipe at the end of the jumper pipe 26. If it is at a higher position, the upper end of the seal ring protrudes like a weir at the slope of the jumper pipe. If there is such a protrusion, the dust flow 31 that slides and falls on the slope of the jumper pipe is blocked and deposited on the protrusion of the seal ring. Since there is a slight gap between the inner circumference of the jumper pipe 1 3 and the outer circumference of the seal ring 14, the dust deposited on the protruding portion of the seal ring passes through this gap and enters the water sealer. In the present invention, preferably, as shown in FIG. 3 (c), when the tip of the jumper pipe contacts the bottom of the water seal 12, the upper end position 25 of the seal ring is the jumper. Than the lowest position 26 of the pipe straight pipe section It is even lower. As a result, the protruding portion of the seal ring is not formed regardless of the state of dust accumulation in the water seal, and it is possible to always prevent dust from entering the water seal.

The clearance W between the inner peripheral side of the tip of the jumper pipe and the outer peripheral portion of the seal ring (Fig. 4) is not preferable if it is too wide because the dust falls into the water seal from the clearance. On the other hand, if the gap is too narrow, it is not preferable because the seal ring cannot be smoothly slid. In the present invention, the difference between the inner diameter of the tip of the jumper pipe and the outer diameter of the seal ring is preferably 1 to 10 mm. As a result, the seal ring can smoothly slide on the inner periphery of the jumper pipe while minimizing the amount of dust falling into the water seal through the gap.

If the inclination of the upper part of the seal ring is too small and the inclination angle 0 shown in FIG. 4 is too small, it is not preferable because the dust ridge does not flow smoothly. On the other hand, if the inclination angle Θ is too large, the height h of the seal ring will be too high, and it will be difficult to make the upper end position of the seal ring lower than the lowest position of the straight pipe at the end of the jumper pipe. Become. If the range of Θ is 20 ° to 60 °, it can be suitably used without causing such problems.

As described above, the jumper pipe 13 is provided on the coal-cooking car 5 of the coke oven so as to be movable up and down, and between each of the mini stand pipes 11 of the carbonizing chamber 21 in which the coal is charged and the carbonizing chamber 22 adjacent thereto. The jumper pipe 13 can communicate. Example

The present invention was applied to a chamber type coke oven. As shown in Fig. 5, a mini standpipe 11 was provided on the opposite side of each carbonization chamber 2 from the riser 6. Charging car 5 has a jumper pipe via a jumper pipe drive 20 13 was installed. As shown in FIGS. 1 and 2, a water seal 12 was provided on the outer periphery of the mini stand pipe 1 1 and filled with water seal water 16. At the tip of the mini stand pipe, the mini stand pipe 11 has an outer diameter of 520 mm and an inner diameter of 500 mm. At the tip of the jumper pipe, the inner diameter of the jumper pipe is 625mm.

A seal ring 14 is provided on the inner periphery of the tip of the jumper pipe so that it can slide in the jumper pipe. The seal ring 14 has an outer diameter of 605 mm and an inner diameter of 450. The inclination angle Θ at the top of the seal ring was 20 °. When the tip of the jumper pipe touches the bottom of the water seal, the upper end position of the seal ring is lower than the lowest position of the straight pipe at the tip of the jumper pipe.

As a result of the operation of the coke oven using the jumper pipe having the seal ring of the present invention, the water seal depth could be maintained without the dust accumulating on the water seal.

On the other hand, as a result of coke oven operation using a conventional jumper pipe without a seal ring, dust was deposited on the water seal and the water seal depth could not be maintained. Also, workers had to clean each time to remove the accumulated dust. Industrial applicability

ADVANTAGE OF THE INVENTION According to this invention, the chamber furnace type coke oven which can prevent the accumulation of dust on a water seal and can maintain a favorable water seal is provided.

Claims

1. In a parallel chamber furnace type coke oven in which a plurality of coking chambers are arranged in parallel, each coking chamber has a mini stand pipe that is a vertical pipe that projects through the ceiling of the coking chamber and protrudes onto the coke oven furnace. One stand pipe has a water seal that goes around the outer periphery of the standpipe, and the two carbon dioxide chambers in the adjacent carbonization chamber

It has a jumper pipe that can communicate between the pipes, and the two downwardly leading ends of the jumper pipe are immersed in the water existing in the water seals of the two adjacent varnish pipes, respectively. It is possible to seal between the tip of the stand pipe and the tip of the corresponding jumper pipe, and there is a seal ring on the inner periphery of the tip of the jumper pipe. The seal ring is the tip of the jumper pipe. The inner diameter of the seal ring is equal to or smaller than the inner diameter of the mini-stand pipe, and the upper shape of the seal ring is inclined downward from the outer circumference toward the inner circumference. And a seal ring spar that defines a lower end position at which the seal ring can slide on the inner periphery of the tip of the jumper pipe. Coke oven.

2. When the tip of the bumper pipe touches the bottom of the water seal, the upper end of the ring ring is lower than the lowest position of the straight pipe at the end of the pipe and the pipe. The chamber furnace type coke oven according to claim 1 characterized by the above-mentioned.

3, ヽ

The difference between the inner diameter of the tip of the jumper pipe and the outer diameter of the seal ring is 1

The furnace-type coke oven according to claim 1 or 2, characterized in that it is ~ 10mm.

4. Jumper pipes are installed in the coke oven's coal cradle so that they can move up and down. The chamber furnace type coke oven according to any one of claims 1 to 3, wherein the end pipes communicate with each other by a jumper pipe.