JP4880826B2 - Oxygen blowing nozzle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oxygen blowing nozzle provided on the bottom surface of a carbon monoxide generator.
[0002]
[Prior art]
In the conventional one known as the oxygen blowing nozzle, the upper surface with the injection port opened is formed flat. The upper surface of the oxygen blowing nozzle is exposed in the furnace on the same plane as the bottom surface of the carbon monoxide generating furnace.
[0003]
In the carbon monoxide generating furnace, oxygen is blown into the furnace from the injection port of the oxygen blowing nozzle to burn coke as fuel. In the lower part of the furnace rich in oxygen, carbon is oxidized on the surface of the coke and carbon dioxide is generated. However, in the upper part of the furnace where the oxygen concentration is low, carbon dioxide is reduced and carbon monoxide is generated. The generated carbon monoxide is sent to a carbon monoxide refining device and used for the production of phosgene.
[0004]
When coke burns and a certain amount of slug accumulates on the bottom of the furnace and closes the injection port of the oxygen injection nozzle, oxygen is no longer supplied into the furnace, resulting in insufficient coke combustion and carbon monoxide. The amount of generation decreases. Therefore, it is necessary to remove the slug that has blocked the injection port of the oxygen blowing nozzle, but the slug removal operation is performed after the operation of the carbon monoxide generator is stopped.
[0005]
[Problems to be solved by the invention]
However, in the conventional oxygen blowing nozzle having a flat upper surface, since the bottom surface of the carbon monoxide generator and the upper surface of the oxygen blowing nozzle are located on the same plane, slug is deposited on the upper surface. The injection port of the oxygen blowing nozzle was easy to be blocked by the slug.
[0006]
Further, in a carbon monoxide generator provided with a plurality of oxygen blowing nozzles, uneven combustion occurs between the vicinity of the closed injection port and the vicinity of other non-closed injection ports. In order to prevent the occurrence of uneven combustion, a larger amount of oxygen must be supplied from an oxygen blowing nozzle whose injection port is not blocked, which places an excessive burden on the oxygen blowing nozzle whose injection port is not blocked. There was a fear.
[0007]
In order to remove the slug with the injection port closed, it is necessary to extinguish the operation of the carbon monoxide generator and stop the operation. Therefore, in the above-mentioned carbon monoxide generator where the injection port is easily blocked by the slug, There is a disadvantage that the frequency is relatively high and the operation efficiency is lowered.
[0008]
Then, this invention makes it a subject to provide the oxygen injection nozzle which the injection port of the oxygen injection nozzle provided in the bottom face of the carbon monoxide generator is hard to be obstruct | occluded with slug in view of said problem.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the oxygen blowing nozzle of the carbon monoxide generating furnace according to the present invention is provided with an oxygen blowing nozzle on the bottom surface, and the upper surface of the oxygen blowing nozzle having an injection port opened is exposed in the furnace. In the carbon monoxide generating furnace, the upper surface of the oxygen blowing nozzle is inclined downward from the injection port toward the outer periphery, and a vertical pipe portion extending downward from the injection port is provided, and a removable lid at the lower end of the vertical pipe portion In addition, a supply pipe for supplying oxygen to the oxygen blowing nozzle is connected to the middle part of the vertical pipe, and the cooling water is stored below the furnace and the bottom surface of the furnace is immersed in the cooling water. A water cup that cools by the water cup, the lower end of the vertical pipe portion penetrates the water cup, the cleaning lid is positioned at the lower part of the water cup, and the supply pipe is a vertical pipe portion in the water cup. Characterized in that it is connected.
[0010]
The upper surface of the oxygen blowing nozzle is preferably formed in a hemispherical shape with the injection port as the uppermost portion, for example.
[0011]
According to this configuration, even if slug accumulates on the bottom surface of the carbon monoxide generating furnace, the slug tends to flow toward the outer periphery of the top surface without staying at the injection port on the top surface of the oxygen blowing nozzle.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1, reference numeral 1 denotes a substantially conical carbon monoxide generator main body. The upper part of the main body 1 is formed so that the inclination angle of the bus bar is gentler than that of the lower part. A coke supply port 1 a is opened at the top of the main body 1. An outlet of a hopper 2 for storing coke is joined to the coke supply port 1a. A slidable partition plate 21 is inserted at the outlet of the hopper 2 in order to adjust the supply of coke into the furnace. When supplying coke from the hopper 2 into the furnace, the partition plate 21 is slid in a direction to open the outlet of the hopper 2. On the other hand, when a predetermined amount of coke is supplied into the furnace, the partition plate 21 is slid in the direction of blocking the outlet of the hopper 2 to stop the supply of coke.
[0013]
In the upper part of the main body 1, a carbon monoxide delivery port 1b is opened at a position different from the coke supply port 1a. A carbon monoxide delivery pipe 3 is connected to the carbon monoxide delivery port 1b.
[0014]
In addition, when coke is supplied into the furnace from the coke supply port 1a, the coke powder may scatter to the carbon monoxide delivery port 1b side, and the generated carbon monoxide may be oxidized again. Therefore, a scattering prevention plate 4 is attached to the coke supply port 1a at a position where the course of the coke powder scattering in the direction of the carbon monoxide delivery port 1b is blocked.
[0015]
The outer periphery of the side surface of the main body 1 is surrounded by a water jacket 5. A gap 6 for supplying cooling water is formed between the water jacket 5 and the main body 1. The upper end portion 5a of the water jacket 5 extends in a trumpet shape, and a jacket overflow port 5b is opened on the side surface of the upper end portion 5a. A drain pipe 7 is connected to the jacket overflow port 5b.
[0016]
Cooling water is supplied to the gap 6 from a cooling water inlet pipe 8 provided at the lower part of the water jacket 5. When the cooling water is continuously supplied from the cooling water inlet pipe 8, the cooling water gradually moves toward the upper end portion 5 a while cooling the main body 1. When the cooling water reaches the jacket overflow port 5 b, it flows into the cooling water drain tank 9 through the drain pipe 7.
[0017]
By cooling the main body 1 with the above configuration, new cooling water is always supplied to the gap 6, and even if coke burns and heat is generated, loss due to melting of the main body 1 is prevented. The movement of the cooling water for cooling the side surface of the main body 1 is indicated by a white arrow.
[0018]
A manhole 10 is opened at a lower portion of the water jacket 5 through the water jacket 5 and the main body 1 at a position different from the cooling water inlet pipe 8. The slug accumulated in the furnace is removed by taking it out from the manhole 10 after extinguishing the carbon monoxide generating furnace and stopping the operation. The manhole 10 is closed by a lid 10a during the operation of the carbon monoxide generator.
[0019]
A water cup 11 is installed below the main body 1. The bottom surface 1 c of the main body 1 heated by the combustion of the coke is cooled from the back surface by the cooling water supplied to the water cup 11.
[0020]
An oxygen blowing nozzle 12 is inserted into the insertion hole 1 d opened in the bottom surface 1 c of the main body 1. An oxygen supply pipe 13 is connected to the oxygen blowing nozzle 12 from outside the furnace through between the main body 1 and the water cup 11.
[0021]
Oxygen supplied from the oxygen supply pipe 13 to the oxygen blowing nozzle 12 is blown into the main body 1 from the injection port 12a.
[0022]
When the coke supplied from the hopper 2 to the inside of the main body 1 is combusted, the oxygen blown into the furnace causes an oxidation reaction of carbon on the surface of the coke, and carbon dioxide is generated. The concentration decreases and the carbon dioxide is reduced to generate carbon monoxide. The generated carbon monoxide is sent to a carbon monoxide refining device (not shown) connected to the delivery pipe 3 via the duct 14 and used for the production of phosgene.
[0023]
Referring to FIG. 2, 12 b is an open nozzle 12 a at the center of the upper surface of the oxygen blowing nozzle 12 inserted into the insertion hole 1 d provided in the bottom surface 1 c of the carbon monoxide generating furnace, and enters the furnace. It is an exposed part. The upper surface 12b exposed in the furnace is inclined downward from the injection port 12a toward the outer periphery. In the present embodiment, the upper surface 12b exposed in the furnace is formed in a hemispherical shape with the injection port 12a as the uppermost portion.
[0024]
Of the upper surface of the oxygen blowing nozzle 12, the outer peripheral portion 12b 'not exposed to the inside of the main body 1 is formed larger than the insertion hole 1d and is located on the back surface side of the bottom surface 1c. In the present embodiment, the upper surface 12b ′ not exposed inside the main body 1 is formed in a stepped shape. A nozzle seat 15 is fitted into a gap formed between the back surface of the bottom surface 1 c and the top surface 12 b ′ not exposed inside the main body 1 to fix the oxygen blowing nozzle 12 to the bottom surface 1 c. The nozzle seat 15 is fixed on the back surface of the bottom surface 1c.
[0025]
By forming the upper surface 12b of the oxygen blowing nozzle 12 as described above, even if slug accumulates on the bottom surface 1c, the upper surface 12b is inclined downward from the injection port 12a toward the outer periphery. In the vicinity of 12a, the slug does not stop and flows in the outer peripheral direction along the upper surface 12b.
[0026]
In addition, the cleaning port 12c of the injection port 12a is attached to the lower end of the oxygen blowing nozzle 12. The cleaning port 12 c is exposed to the outside from the bottom surface of the water cup 11. During the operation of the carbon monoxide generating furnace, the tip of the cleaning port 12c is closed with the cap 12d. Slug that has entered the inside of the nozzle from the injection port 12a is extinguished by extinguishing the carbon monoxide generating furnace, and then the cap 12d is removed. For example, a nozzle stick (not shown) is directed from the cleaning port 12c toward the injection port 12a. By inserting, it can be pushed out into the carbon monoxide generator and removed.
[0027]
【Effect of the invention】
As apparent from the above description, in the present invention, since the upper surface of the oxygen blowing nozzle is inclined downward from the injection port toward the outer periphery, the injection port is not easily blocked by the slug.
[0028]
Moreover, since the frequency of the slug removal operation is less than that of the conventional oxygen blowing nozzle, the operating efficiency of the carbon monoxide generating furnace is improved.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a carbon monoxide generating furnace. FIG. 2 is a side sectional view of an oxygen blowing nozzle.
DESCRIPTION OF SYMBOLS 1 Main body 2 Hopper 3 Carbon monoxide delivery pipe 4 Scatter prevention plate 5 Water jacket 6 Crevice 7 Drain pipe 8 Cooling water inlet pipe 9 Cooling water drain tank 10 Manhole 11 Water cup 12 Oxygen blowing nozzle 12a Injecting port 12b Oxygen blowing A portion of the upper surface of the nozzle exposed in the furnace 13 Oxygen supply pipe 14 Duct 15 Nozzle seat

Claims (2)

In a carbon monoxide generating furnace in which an oxygen blowing nozzle is provided on the bottom surface and the top surface of the oxygen blowing nozzle is opened in the furnace, the top surface of the oxygen blowing nozzle is inclined downward from the nozzle toward the outer periphery. In addition, a vertical pipe portion extending downward from the injection port is provided, a removable cleaning lid is attached to the lower end of the vertical pipe portion, and a supply pipe for supplying oxygen to the oxygen blowing nozzle is provided in the middle of the vertical pipe portion. A water cup that cools by storing cooling water below the furnace and immersing the bottom surface of the furnace in the cooling water, and has a lower end of the vertical pipe portion penetrated through the water cup for cleaning. An oxygen blowing nozzle characterized in that a lid is positioned at a lower portion of a water cup and the supply pipe is connected to a vertical pipe portion in the water cup . 2. The oxygen blowing nozzle according to claim 1, wherein an upper surface of the oxygen blowing nozzle is formed in a hemispherical shape with an injection port as an uppermost portion.

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