JP2854480B2 - Coke oven riser bend attached carbon removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing carbon adhering to an inner wall of a bend section connecting a riser pipe of a coke oven and an air collecting main pipe.

[0002]

2. Description of the Related Art Coke oven gas generated when coking coal is carbonized in a coke oven is led to an ascending pipe from a gas passage above the coking chamber, cooled and washed by low-temperature water sprayed by a bend, and then sent to an air collecting main pipe. It is introduced, sucked by a suction blower, and sent to a gas purification step in the subsequent step. Carbon in the coke oven gas adheres and accumulates on the riser pipe and the inner wall of the bend, which guide the coke oven gas generated during the carbonization to the air collecting main pipe.
In particular, the carbon adhering to the inner wall of the bend closes the bend and hinders gas flow, causing an increase in furnace pressure.

Conventionally, carbon removed from the riser bend has been manually removed by using a scraping rod called a spear. However, the work of removing the deposited carbon is carried out by using a tar-containing atmosphere gas, heat, heavy wire, or dust. This was the most severe condition of coke oven work, and was avoided by workers as so-called 3K work. In order to prevent carbon from adhering to the riser bend, it has been confirmed that it is effective to spray water on the inner wall of the bend to form a water film on the inner wall surface. A sprinkling device is installed at the bend to continuously spray low-pressure water to prevent carbon deposition.

[0004] As a sprinkler for the riser tube bend part,
A sprinkler tube provided with a number of sprinkler holes is provided in the bend, and a liquid film is constantly formed on the upper inner wall surface of the bend by spouting liquid ejected from the sprinkler holes (Japanese Utility Model Publication No. 48-23474). A spray nozzle (Jpn. Pat. Appln. KOKAI Publication No. 51-14917) in which a plurality of through-holes are formed radially on the side of the main body to allow communication between the central conducting hole and the outside, and the tip of a sprinkling pipe inserted into a bend pipe. A plug body provided with a plurality of grooves in the longitudinal direction on the outer periphery of the head is screwed into the bend, the conduit of the branch pipe communicates with the groove, and the head of the plug body is installed upward (bend). Japanese Patent Publication No. Sho 51-14918), a sprinkler in which a sprinkler tube having a sprinkler tube with a tip end sealed with a sprinkling hole on the side surface of the tip end is detachably inserted into a bend from outside (Japanese Utility Model Publication No. 53-1983).
JP-A-41175), a sprinkler in which a peripheral wall surrounding a nozzle is formed on a mounting member of a nozzle pipe having a plurality of nozzles arranged on a base peripheral surface (Japanese Utility Model Laid-Open No. 61-82943), a bend pipe A plurality of nozzle holes are drilled from the left and right of the horizontal part to the point that is slightly opposite to the top of the inner surface from the left and right, and a water injection pipe is connected to this, and the inner surface is uniformly uniform in the circumferential direction inside the pipe. Spraying device to make water flow down (Japanese Utility Model Application 63-949)
A number of proposals have been made such as a bend (JP-A-3-210386), which covers the inner wall of a bent portion of a bend with a separating material and is provided with a mechanism for spray cooling the inner wall. This illustrates the magnitude of the problem of carbon deposition on tube bends.

[0005] Each of the above-mentioned liquid dispersing devices for riser bend sprays low-pressure water for the purpose of forming a water film on the inner wall surface of the bend, and avoids damage to the brick due to cooling of the brick lining the straight part of the riser. Therefore, the bend spray area is sprayed in the opposite direction to the straight pipe section so that the spray liquid does not flow into the straight pipe section. It is general to have a slope with a downward slope against the pipe portion.

[0006]

In the above liquid sprinklers of the riser bends, since there is a limit in the liquid sprinkling range, carbon adhesion surely occurs in the blind spot of the liquid sprinkling. The amount of the deposited carbon is extremely small compared to the amount of carbon deposited before the installation of the spraying device, and is soft and soft. However, since the passage of gas at the entrance to the bend is hindered and the gas pressure in the carbonization chamber rises, the amount of carbon deposited is 15 to 15. Once every 30 days, about 10 minutes / kiln is used for manual removal using a spear. However, there are several hundred or more risers (kilns) in a coke plant, and it is not easy to remove the carbon adhering to the blind spot of the entire bend, and the working environment is as described above. It is heavy bar work under high heat and gas atmosphere containing tar, and improvement is desired.

[0007] As a method for removing carbon adhering to the blind spot of the bend liquid, a mobile high-pressure water cleaning device has been proposed. However, this method has a problem in the heat resistance of the cleaning nozzle portion because the canopy at the top of the riser tube is opened and the cleaning nozzle is inserted from that portion. It is impossible to make a nozzle structure and device that can cover the injection, and it is difficult to install a high-pressure water washing device in the riser pipe in terms of weight and space, and even if attached carbon could be removed However, there is a problem that the maintenance department of the high-pressure water cleaning device requires more work in the maintenance department.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid riser bend spraying device capable of removing carbon adhering to a blind spot portion of a conventional riser tube bend spraying device.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object. As a result, the carbon adhering to the portion of the liquid sprinkler of the riser bend which is a blind spot of liquid sprinkling is so-called soft carbon, the adhering force is not so strong, and the nozzle and the carbon adhering part are separated by 30 cm in the high pressure water removal test. 700 kg / cm ² at the position
5 cm by spraying 5 l / min high pressure water for 2 seconds
The carbon on all sides has been completely removed. Therefore, 40
0 to 700 kg / cm ² of high-pressure water for 15 to 30 days
It has been concluded that if a small amount of water is sprayed for a short time from the nozzle of the spraying device or a dedicated nozzle provided separately at a frequency of times, it can be completely removed by the water hammer of the high-pressure water.

That is, the present invention relates to a bend-adhering carbon removing apparatus for preventing carbon from adhering to the inner wall of a coke oven rising pipe bend by spraying low-pressure water from a sprinkler.
A high-pressure water supply pipe is connected to the low-pressure water supply pipe to the sprinkler, and automatic sprinkling valves are provided for each of the low-pressure water supply pipe and the high-pressure water supply pipe. An apparatus for removing carbon from a bend in a coke oven riser, wherein the valve is opened for a short time.

Further, in a bend adhering carbon removing apparatus for preventing carbon from adhering to the inner wall of a bend of a coke oven riser pipe by spraying low pressure water from a liquid spraying device, the device is directed to a position where a blind spot of low pressure water injection from the spraying device is formed. A high-pressure water nozzle, and a bypass between the high-pressure water supply pipe and the low-pressure water supply pipe to the high-pressure water nozzle. A coke oven riser bend removing carbon device for supplying water.

[0012]

According to the present invention, a high-pressure water supply pipe is connected to a low-pressure water supply pipe to a sprinkling device, and automatic sprinkling valves are provided in each of the low-pressure water supply pipe and the high-pressure water supply pipe. By opening the sprinkler automatic valve of the high-pressure water supply pipe for a short time, the blind spot of the low-pressure water sprinkler of the bend sprinkler can be diffused at high pressure and set to the water hammer range. Attached carbon can be completely removed from the portion where carbon attachment cannot be prevented by water spray. Further, since the carbon removing device of the present invention performs the high-pressure water injection in a fixed manner, the problem of the heat resistance of the nozzle, which is a drawback of the movable high-pressure water washing nozzle, is constantly performed by the low-pressure water spray continuously. Can be resolved. In addition, the equipment around the riser pipe is only pipes, so it is lightweight and does not require installation space. Maintenance is also advantageous in terms of maintainability because only high-pressure automatic valves and low-pressure automatic valves are installed nearby. It is.

Further, in the present invention, a nozzle dedicated to high-pressure water is disposed toward a position where the low-pressure water is sprayed from the sprinkler, and a high-pressure water is supplied from the high-pressure water supply pipe to the nozzle dedicated to high-pressure water for a short time at a predetermined frequency. By supplying water, the high-pressure water nozzle can directly apply high-pressure water hammer to the adhering carbon, and can remove the dead carbon adhering to the low-pressure water jet from the sprinkler. . Further, in the present invention, by providing a bypass between the high-pressure water supply pipe and the low-pressure water supply pipe to the high-pressure water dedicated nozzle, it is possible to always supply a small amount of low-pressure water except during high-pressure water supply,
The high pressure water nozzle can be prevented from being clogged, and the high pressure water nozzle can be protected from high heat.

In the present invention, the injection frequency of high-pressure water is preferably 15 to 3 for each riser pipe because the deposited carbon at the position where the low-pressure water is injected from the sprinkler is a blind spot is soft carbon.
Once a day is sufficient. The injection pressure of high-pressure water is
30 kg / cm ² or more, preferably 400 to 700 kg
/ Cm ² is effective. The injection amount of high-pressure water is about 15 to 30 l / min, and the injection time is 2
The attached carbon can be sufficiently removed in about 5 seconds.
At the time of injection of high-pressure water, water diffuses around and partly comes into contact with the riser straight pipe brick part, but it is temporary, the amount of water is very small, and most of the water evaporates due to the rising heat from the carbonization chamber. ,
There is no damage problem due to cooling of the riser lining bricks. The pump unit that supplies high-pressure water is installed in a place with good environmental conditions away from the riser and transports high-pressure water. The pressure loss is slight. In addition, there are pump units up to 4000 kg / cm ² as high-pressure water pumps at present, but a pump unit of 1000 kg / cm ² is sufficient.

[0015]

【Example】

Embodiment 1 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing the entire configuration of a coke oven riser equipped with a riser bend-attached carbon removing device according to the present invention, and FIG. 2 shows the state of water spraying at the time of low-pressure water sprinkling and the state of carbon adhesion at the watering blind spot. a) Figure is a side sectional view,
FIG. 3 (b) is a front view, FIG. 3 (c) is a view seen from above, FIG. 3 is a view showing a water sprinkling state and a carbon adhesion state at the time of high pressure water injection, and FIG. The figure is a front view, (c)
The figure is a view seen from above, and FIG. 4 is an explanatory view showing an example of an installation position of a pump unit for supplying high-pressure water.

In FIG. 1, reference numeral 1 denotes an ascending pipe erected at the end of each coking chamber 3 of the coke oven 2 in the furnace length direction, 4 denotes a lining brick on the inner surface of the ascending pipe 1, and 5 denotes water provided at the top of the ascending pipe 1. A sealed canopy 6 is a bend connecting the riser 1 and the air collecting main 7.
At the lower end of the bend 6, a dish valve 8 is provided. At the time of dry distillation, the water seal type canopy 5 is closed and the dish valve 8 is opened to connect each of the carbonization chambers 3 to the air collecting main pipe 7 to generate coke. Furnace gas is introduced into the air collecting main pipe 7 through the riser pipe 1 and the bend 6. 9 is a gas liquid spray nozzle for cooling and cleaning the gas provided in the bend 7;
The low pressure gas liquid main pipe 10 and the medium pressure gas liquid main pipe 11 are connected via a three-way switching valve 12 for smokeless charging at the time of coal charging into the coking chamber 3, and the gas is cooled and cleaned by the low pressure gas liquid during carbonization. In addition, when coal is charged, the generated gas is sucked from the carbonization chamber 3 by an ejector effect by spraying the medium-pressure gas for smokeless charging.

Numeral 13 denotes a liquid spray nozzle provided at the outlet of the riser pipe 1 for preventing carbon adhesion, and is connected to the low-pressure gas liquid main pipe 10 via a low-pressure automatic liquid spray valve 14. The sprinkling nozzle 13 includes a high-pressure water main pipe 15 and a high-pressure sprinkling automatic valve 16.
Is connected via a normally as shown in FIG. 2 is opened low pressure dispersion liquid automatic valve 14, the low-pressure gas liquid water spray angle theta _1,
Liquid is sprayed at θ ₂ , α ₁ , and α ₂ to prevent carbon from adhering to the inner wall of the bend 6. However, since the carbon 17 adheres and grows in the blind spot of the low-pressure gas liquid spray, the low-pressure liquid automatic valve 14 is closed about once every 15 to 30 days to open the high-pressure liquid automatic spray. Since the valve 16 is opened and high-pressure water of about 400 to 700 kg / cm ² is injected as shown in FIG. 3, it is diffused from the low-pressure gas liquid dispersion range,
Watering angles 1.5θ ₁ , 1.5θ ₂ , 1.5α ₁ , 1.5α ₂
The carbon 17 adhered as a blind spot of the spray of the low-pressure gas liquid is destroyed and removed by the water hammer force. Reference numeral 18 denotes a pump unit that supplies high-pressure water to the high-pressure water main pipe 15 installed at the end of the coke oven 2 on the coal tower 19 side.

With the above-described structure, the water spray angles θ 1, θ 1 of the low-pressure gas liquid from the liquid spray nozzle 13 at all times are provided.
The carbon 17 adhered as a blind spot of the liquid spray at 2, α1 and α2 is soft carbon and the adhesion is not so strong. Therefore, the pump unit 18 is started about once every 15 to 30 days and the high pressure is applied. 400 to 700 kg /
cm ² of high-pressure water, the low-pressure sprinkling automatic valve 14 is closed, and the high-pressure sprinkling automatic valve 16 is opened to 400 to 700 kg / c.
m ² high-pressure water with water spray angles of 1.5θ ₁ , 1.5θ ₂ , 1.5
alpha _1, in 1.5α _2, since 2 to 5 seconds injected at 15~30l / min, is almost completely removed by destruction of carbon 17 by the high-pressure water water impulsive force. When the injection of the high-pressure water is completed, the high-pressure sprinkling automatic valve 16 is closed and the low-pressure sprinkling automatic valve 14 is closed.
To supply the low-pressure gas liquid from the low-pressure gas liquid main pipe 10 to the spray nozzle 13 to prevent carbon from adhering to the inner wall of the bend 6. It is desirable that the removal operation of the carbon 17 be continuously performed for each riser 1 in the furnace row direction of the coke oven 2 in terms of the frequency of starting the pump unit 18. It is also possible to carry out in batches.

Embodiment 2 Another embodiment of the present invention will be described with reference to FIG. FIG. 5 is an overall configuration diagram of a coke oven riser when a nozzle dedicated to high pressure water is installed separately from the low pressure water sprinkler. In FIG. 5, reference numeral 21 denotes a nozzle dedicated to high-pressure water, which is disposed separately from the spray nozzle 13 toward the carbon 17 attached as a blind spot of the spray of the low-pressure gas liquid from the spray nozzle 13. It is connected to a high-pressure water supply main pipe (not shown) via an automatic valve 22. Reference numeral 23 denotes a bypass connecting the low-pressure gas liquid pipe and the high-pressure water pipe via a valve 24. Usually, a small amount of the low-pressure gas liquid flows from the low-pressure gas liquid pipe to the nozzle 21 dedicated to the high-pressure water. The valve 24 is closed about once every 15 to 30 days and the high-pressure sprinkling automatic valve 22 is opened.
15 to 30 l / mi of high pressure water of 0 to 700 kg / cm ²
It is configured to eject for 2 to 5 seconds at n.

With the above configuration, 15
Once every 30 days, the valve 24 is closed and the high pressure sprinkling automatic valve 22 is opened, and 400 to 700 kg / cm ² of high pressure water is directly injected into the carbon 17 from the high pressure water dedicated nozzle 21.
Since jetting is performed at 5 to 30 l / min for 2 to 5 seconds, the high pressure water dedicated nozzle 21 can directly apply water hammer to the attached carbon 17, and the carbon 17 is broken and almost completely removed. When the injection of the high-pressure water is completed, the high-pressure sprinkling automatic valve 22 is closed and the valve 24 is opened, and a small amount of the low-pressure gas liquid is supplied from the bypass 23.
1 is prevented from clogging, and the high pressure water dedicated nozzle 21 is protected from the high temperature of the coke oven gas.

[0021]

As described above, according to the apparatus for removing carbon from a riser bend according to the present invention, the blind spot of the spraying device which cannot be prevented by the conventional bend low-pressure spraying device can be prevented without opening the canopy of the riser. Since the attached carbon can be removed almost completely by remote control, there is no need for manual carbon removal work, and the 3K problem has been solved, and the coke oven staffing problem and the special law problem for handling tar have been solved. Will be resolved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a coke oven riser equipped with a riser bend-attached carbon removing device of the present invention.

FIGS. 2A and 2B show a water sprinkling state at the time of low-pressure water sprinkling and a carbon adhesion state at a water sprinkling blind spot. FIG.
(B) is a front view, and (c) is a view seen from above.

3A and 3B show a water sprinkling state and a carbon adhering state at the time of high-pressure water injection. FIG. 3A is a side sectional view, FIG. 3B is a front view, and FIG. 3C is a view seen from above.

FIG. 4 is an explanatory diagram illustrating an example of an installation position of a pump unit that supplies high-pressure water.

FIG. 5 is an overall configuration diagram of a coke oven riser when a nozzle dedicated to high-pressure water is installed separately from the low-pressure water sprinkler.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rise pipe 2 Coke oven 3 Carbonization room 4 Lining brick 5 Water seal type canopy 6 Bend 7 Air collecting main pipe 8 Dish valve 9 Gas liquid spray nozzle for cooling and washing 10 Low pressure gas liquid main pipe 11 Medium pressure gas liquid main pipe 12 Three-way switching valve 13 Sprinkling nozzle 14 Low pressure sprinkling automatic valve 15 High pressure water main pipe 16 High pressure sprinkling automatic valve 17 Carbon 18 Pump unit 21 High pressure water dedicated nozzle 22 High pressure sprinkling automatic valve 23 Bypass 24 valve

──────────────────────────────────────────────────続 き Continuing on the front page (72) Mikio Watanabe, Inventor 3, Kashima-cho, Kashima-gun, Ibaraki Pref., Sumitomo Metal Industries, Ltd. Inside the Kashima Works of Metal Industry Co., Ltd. (72) Mitsuyuki Tamura, 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Tsutomu Matsuno 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Within Nippon Kokan Co., Ltd. (72) Inventor Makoto Hamaki 1-chome, Mizushimagawa Tetsudori, Kurashiki-shi, Okayama Pref. Chome (without address) Kawasaki Steel Corporation Mizushima Works (72) Inventor Masato Kato 7 Kanazawacho, Kakogawa City, Hyogo Prefecture Kansai Heat Manabu Co., Ltd. Kakogawa in the factory (72) inventor Mazda KazuKiyoshi Hyogo Prefecture Kakogawa Kanazawa-cho, 7 address Kansai thermalization Science Co., Ltd. Kakogawa in the factory (58) investigated the field (Int.Cl. ^6, DB name) C10B 43 / 08 C10B 27/06 C10B 43/14

Claims (2)

(57) [Claims] 1. A high-pressure water supply pipe is connected to a low-pressure water supply pipe to a sprinkler in a bend-adhered carbon removing apparatus for preventing adhesion of carbon to the inner wall of a coke oven riser pipe bend by spraying low-pressure water from a sprinkler. Coke oven rising pipe bends, wherein automatic sprinkling valves are provided in each of the low-pressure water supply pipe and the high-pressure water supply pipe, and the sprinkling automatic valves of the high-pressure water supply pipe are opened for a short period of time at a predetermined frequency. An attached carbon removal device. 2. A bend-adhering carbon removing apparatus for preventing carbon from adhering to the inner wall of a bend of a coke oven riser pipe by spraying low-pressure water from a sprinkling device. A high-pressure water nozzle, and a bypass between the high-pressure water supply pipe and the low-pressure water supply pipe to the high-pressure water nozzle. An apparatus for removing carbon from a coke oven riser bend, which supplies water.