JPH06248272A - Clearing apparatus for deposited carbon in carbonizing chamber of coke oven - Google Patents

Abstract

PURPOSE:To provide a cleaning apparatus capable of effectively removing carbon deposited on an oven wall of a carbonizing chamber and near a coal feeding hole of a chamber type coke oven. CONSTITUTION:The carbon deposited near a feeding hole is removed by blowing off with air from a high-pressure nozzle 1 and the carbon deposited on the whole oven wall is removed by combustion with air, etc., from a low-pressure nozzle 2.

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 deposits in a coke oven chamber type coke oven.

[0002]

2. Description of the Related Art Carbon generated by pyrolysis of coke oven gas generated during carbonization of carbon adheres to the wall of a carbonization chamber of a chamber furnace type coke oven. This carbon adhering to the furnace wall densely closes the joints of the bricks on the furnace wall, and has an effective function of preventing gas leakage from the carbonization chamber to the combustion chamber.On the other hand, if left as it is, it grows and the effective volume of the carbonization chamber grows. Not only to reduce the productivity of the furnace but also to prevent the coke from being stopped and clogged, which causes damage to the furnace body. Further, the carbon adhering to the charging port causes charging clogging.

Therefore, in order to prevent the above-mentioned harmful effects, it is necessary to regularly remove the adhered carbon. As the method of removing carbon from the furnace wall, there are conventionally used a method of manually dropping it with a spear-like protruding rod and a method of burning and removing adhered carbon by emptying the carbonization chamber and removing and leaving the charging hole lid and door. ing.

However, the above method has a problem that the former requires heavy work, high temperature, and dangerous work, and the latter causes a marked decrease in productivity. Therefore, as a technique for coping with the above-mentioned problems, a method of ejecting air from the rack beam by using a rack beam of a coke oven as a duct to eject carbon during extrusion (JP-A-3-195797) and an ejection nozzle There is disclosed a method (Japanese Patent Laid-Open No. 62-161884) in which a lance provided with a lance is provided so as to be capable of advancing and retreating.

[0005]

However, in the method disclosed in Japanese Patent Laid-Open No. 195797/1993, since the rack beam is used as a duct, the strength of the cutout or pressure loss of the strength member is large, and the amount of air blown is large, and the carbon content is sufficient. The removal effect was not obtained. Further, in the method disclosed in Japanese Patent Laid-Open No. 62-161884, the amount of blown air can be arbitrarily increased by increasing the number of lances, but the weight of the lance increases and the load on the furnace increases.

Further, JP-A-3-195797 and JP-A-SHO
In both of the methods of 62-161884, a sufficient gas flow (supply) cannot be obtained in the vicinity of the charging port, and the effect of removing carbon in the vicinity of the charging port is hardly obtained. It is an object of the present invention to provide a compact and efficient carbonization chamber carbon removal device that enables removal of adhered carbon over the entire carbonization chamber including a charging port in a short time.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to an apparatus for removing adhered carbon in a carbonization chamber of a coke oven of a chamber furnace type, in which a trolley moving on the coke oven is provided with air for the vicinity of the coal charging hole of the coke oven. Alternatively, a high-pressure jet nozzle for oxygen-added air is provided,
Further, there is provided a lance provided with a low-pressure jet nozzle for air or oxygen-added air for the central part of the carbonization chamber, which is an apparatus for removing carbon adhering to a carbonization chamber of a coke oven, preferably the high-pressure jet nozzle is a charging hole. It is a device for removing adhering carbon in a coke oven carbonization chamber in which a lance equipped with a low-pressure jet nozzle is tilted in the extrusion direction in the carbonization chamber.

[0008]

The above-mentioned present invention has been completed based on the findings of the following research results by the present inventors. The chemical composition of carbon adhering to the side wall of the carbonization chamber and carbon adhering to the vicinity of the charging hole are almost the same with 97 to 99%,
It was found that the characteristics differ greatly. That is, the carbon generated on the side wall is very dense and hard, but the carbon generated in the vicinity of the charging hole has many pores and the degree of adhesion to the wall is weak.

Therefore, in removing the adhered carbon, the side wall is preferably removed by combustion. By moving the lance with respect to the adhered carbon on the side wall and efficiently blowing oxygen, a high removal effect can be obtained with a small air volume. To be On the other hand, the carbon adhering to the charging hole can be removed in a short time by blowing it off with high pressure air. FIG. 6 shows the results of measuring the removal time of carbon adhering to the charging hole in one dry distillation cycle by changing the spray pressure of the nozzle part. From this, it can be seen that a good blowing effect can be obtained if the spray pressure of the nozzle portion is 4 kg / cm ² or more.

Therefore, in the present invention, a high pressure jet nozzle is provided for the carbon adhering in the vicinity of the charging hole of the chamber coke oven so that the carbon can be blown off and removed. Further, by providing a low pressure jet nozzle for the carbon adhering to the side wall and inserting it into the carbonization chamber and preferably tilting it in the extrusion direction, it is possible to efficiently spray and remove the adhering carbon by blowing air or a gas added with oxygen. I chose

Next, the present invention will be described in more detail based on examples.

[0012]

1 is a sectional view showing an embodiment of the present invention. The high-pressure nozzle 1 was attached to all the charging holes 3, and the low-pressure nozzle 2 was provided at two places 3b and 3c in the center of the charging hole. A compressor 5 was used as a device for supplying the ejected gas for the high-pressure nozzle 1. A turbo blower 6 was used as a device for supplying the jet gas for the low-pressure nozzle 2.

FIG. 2 is a perspective view of the lance 7 in which the high pressure nozzle 1 and the low pressure nozzle 2 are combined. The lance 7 is a double pipe so that a low pressure gas flows toward the center and a high pressure jet gas flows toward the outside. The high-pressure nozzle 1 for the charging hole portion is preferably attached to all charging holes 3. On the other hand, the number of low-pressure nozzles and the mounting location may be arbitrarily determined based on the carbon adhesion state and the layout on the furnace.

The dolly 8 is connected to a charging vehicle (not shown),
The carbon removal work in the carbonization chamber 9 just before the completion of the extrusion work and the charging is performed. Of course, the dolly 8 may be self-propelled without being connected to the charging vehicle. FIG. 3 is a perspective view of an embodiment showing a support mechanism for the lance 7 in which the high pressure nozzle 1 and the low pressure nozzle 2 are combined. The lance 7 is tiltably held by a lance holding case 14 by a tilt fulcrum 15, and the lance holding case 14 is supported by a lance lifting guide rail 12 via a guide roller 13. The lance holding case 14 is lifted and lowered by a winch 18 installed on the carriage 8 via a wire rope 17. The tendency of the lance 7 in the coke pushing direction is performed by the lance tilting cylinder 16.

FIG. 4 is a partially enlarged sectional view of a high pressure nozzle 1 combined with a low pressure nozzle 2 showing another embodiment, and FIG. 5 is a view taken along the line AA of FIG. 20 is a jet of high pressure gas,
It has a structure capable of rotating around the high-pressure gas introduction outer tube via the bearing 23 by the gas ejection energy. Further, 21 is a reciprocating spiral groove engraved around the high pressure gas introduction outer tube, the slide piece 22 is guided in the groove along with the rotation, and the high pressure nozzle can rotate and move up and down.

The operation flow will be described below. First, the push-out work is completed, and after the door 10 is attached, the lid is removed by the loading hole lid remover (not shown) attached to the carriage 8. Next, the turbo blower 6 is rotated to eject the air from the low pressure nozzle 2. After that, the lance 7 is inserted from the charging hole 3. After confirming that the blow-out prevention cover 11 connected to the lance 7 is on the charging hole, increase the rotation of the turbo blower 6,
Further, the valve of the compressor 5 is opened to start the carbon removal work.

The low-pressure nozzle 2 tilts with respect to the extruding direction according to the state of carbon adhesion to burn and remove carbon. The air volume at this time was about 6000 Nm ³ / h. The high-pressure nozzle 1 blows off and removes the carbon in the vicinity of the charging hole by the air pressure of 4 kg / cm ² . After carbon removal is complete,
The lance 7 is extracted and the charging hole is attached to complete the process. This working time requires 60 to 80 seconds.

As a result of using the apparatus of the present invention, the manual work conventionally performed is eliminated, and the carbon removal work can be automatically performed in a short time.

[0019]

According to the present invention, by providing two kinds of jet nozzles of high pressure and low pressure, it is possible to efficiently remove the carbon adhering to the charging port and the side wall. Further, by making the low-pressure nozzle tiltable in the extrusion direction, it is possible to uniformly remove the carbon in the carbonization chamber with a small number of lances for the jetted gas.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a lance in which a high pressure nozzle and a low pressure nozzle are combined.

FIG. 3 is a perspective view showing a lance support mechanism in which a high-pressure nozzle and a low-pressure nozzle are combined.

FIG. 4 is a partially enlarged explanatory view of a high pressure nozzle portion.

FIG. 5 is a partial cross-sectional view of a high pressure gas ejection port.

FIG. 6 is a graph showing a relationship between pressure and time when removing adhered carbon in the vicinity of a charging hole.

[Explanation of symbols]

 1 High pressure nozzle 2 Low pressure nozzle 3 Charging hole 3a Charging hole No.1 3b Charging hole No.2 3c Charging hole No.3 3d Charging hole No.4 4 Coke oven 5 Compressor 6 Turbo blower 7 Lance 8 Truck 9 Carbonization chamber 10 Door 11 Blow-off prevention cover 12 Guide rail (for lifting lance) 13 Guide roller 14 Lance holding case 15 Lance tilting fulcrum 16 Lance tilting cylinder 17 Wire rope 18 Winch 19 Hose 20 High pressure gas jet 21 Reciprocating spiral groove 22 Slide piece 23 Bearing

Claims (3)

[Claims] 1. A high-pressure jet nozzle for air or oxygen-added air for a portion near a coal charging hole of a carbonization chamber of a dolly moving in the carbonization chamber of a carbonization chamber of a chamber-type coke oven. And a lance having a low-pressure jet nozzle for air or oxygen-added air for the central part of the carbonization chamber. 2. The apparatus for removing carbon adhering to a carbonization chamber of a coke oven according to claim 1, wherein the high-pressure jet nozzle swirls or vertically moves within the charging hole. 3. A lance equipped with a low-pressure jet nozzle tilts in the extrusion direction in the carbonization chamber.
Alternatively, the adhering carbon removing device of the coke oven carbonization chamber according to item 2.