JPH08239667A - Method and apparatus for removing carbon deposited on charging port of coke oven - Google Patents

Abstract

PURPOSE: To provide a method for removing carbon deposited on a charging port of a coke oven which can eliminate a danger and an environmental problem involved in removal of carbon deposited on the charging port by pushing-off using a crowbar by human power and burning-off utilizing air combustion and can safely and surely remove the deposited carbon in a short time by ejecting hard particulates towards a deposited carbon layer within the oven by a hard particulates ejection means. CONSTITUTION: The drawing is a side view of an apparatus for removing carbon deposited on the charging port of a coke oven. This apparatus comprises a particulate ejection nozzle mechanism A and a blast generating mechanism B. A coke oven 1 comprises an oven wall 1A, a charging port 1B, and a coke oven chamber 1C. The mechanism A has a particulate ejection nozzle 2 which can be inserted into the charging port 1B. A nozzle 2 is held on a body base 10 by means of a holder 3, and the inclination angle is variable by means of an inclination cylinder 4. The mechanism B comprises a hopper for storing and taking off particulates and a compressor for application of a high pressure gas. A mixed material comprising a coke powder and a blast material is suitable as the hard particulates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to removal of carbon adhering to the periphery of a coke oven, and more particularly to a method and apparatus for removing carbon adhering to and growing at a charging port for supplying coal to a carbonization chamber. Is.

[0002]

2. Description of the Related Art In coke oven operation, carbon is generated at the coal inlet of the coal ceiling of the carbonization chamber during carbonization, and the effective inner diameter of the inlet becomes smaller, which hinders the feedability and narrows the gas passage. As a result, there are problems such as deterioration of coke quality due to uneven carbonization, and clogging of coke due to carbon ridges at the bottom of the charging port. For this reason, it is necessary to regularly remove the adhered carbon,
It was a heavy labor due to the work of pushing down with human power.

Various inventions have been made as prior art relating to the removal of carbon adhering to the coal charging port. A characteristic example is shown below.

The air combustion burning-off method, which is similar to the base of the ascending pipe and the carbonization chamber, is typical. For example, a method of spraying air from a nozzle arranged at the charging port is used.
There is Japanese Patent Laid-Open No. 103448. As shown in FIGS. 5 and 6, this is a coke oven 1 (1A is a furnace wall, 1B is a charging port,
The fluid pipe 12 is inserted into the coal charging port 1B from the coal car running on the top of the carbonization chamber (1C), the lifting device for moving the fluid pipe 12 up and down, and the compressed fluid is fed into the fluid pipe 12. When the fluid pipe 12 descends, a compressed fluid is blown toward the inner wall surface of the coal charging port 1B from an air nozzle 13 provided at the tip of the fluid pipe 12 immersed in the coal charging port 1B. This is a cleaning device for a coal charging port in a coke oven, which is configured to remove the deposit (carbon) 14 on the inner peripheral wall surface (hereinafter referred to as "prior art 1").

On the other hand, as a method of mechanically removing the adhered carbon, there is a method of forcibly removing it from the top of the coal car 15 by a rotary scraper 16 having a rotary shaft 17 as shown in FIG. 7 (hereinafter referred to as "Prior Art 2"). That).

[0006]

However, the conventional air-combustion burning-off method and mechanical removal method shown in the above-mentioned prior arts 1 and 2 have the following problems.

The air burn-off method shown in the prior art 1 has been generally used in the past and is used in many furnaces because it is easy to handle as on-site work. However, its removal performance and efficiency are low.

The mechanical removal method shown in the prior art 2 is more improved than the air combustion method shown in the prior art 1 in the removal performance of adhered carbon. However, there are many consumable parts due to high heat, and when mounted on a moving machine such as a coal car, there is still a big problem that the processing time is restricted and time cycle becomes difficult. Since there are problems such as adherence of dirt and scraping bricks directly, there are few that have been put to practical use and utilized.

The problems relating to the removal of carbon adhering to the inlet of the coke oven obtained from the prior art are summarized as follows. The removal performance of the air burning method is low. Similarly, the method using only chemical reaction is also poor in removal efficiency. The mechanical scraping method has several proposals in the past, but it is efficient because it directly removes the adhering carbon, but the carbon to be removed adheres to the scraping part (scraper itself), Because it is exposed to high temperatures,
There is a problem that maintenance and repair of mechanical parts are expensive. When it is mounted on a furnace machine (charcoal car), it takes a long time to remove carbon, and the time cycle of carbonization may be impaired.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a method and an apparatus capable of efficiently and economically removing carbon adhering to the inlet of a coke oven.

[0011]

According to the first aspect of the present invention,
In the method for removing carbon adhering to the inlet of the coke oven, it is characterized in that the carbon adhering to the furnace is removed by injecting the hard granular material toward the carbon adhering layer in the furnace by means of the hard granular material ejecting means. is there.

According to a second aspect of the present invention, in the method for removing adhered carbon at the inlet of a coke oven, a high-pressure gas that reacts with the hard particles and high temperature carbon is directed toward the in-furnace adhering carbon layer by means of the hard particles injection means. It is characterized in that the carbon adhering to the inside of the furnace is removed by injecting the carbon dioxide.

According to a third aspect of the present invention, in the apparatus for removing adhered carbon at the inlet of a coke oven, the hard powder particles for removing the adhered carbon in the furnace are injected toward the carbon layer adhered in the furnace. It is characterized by having a body ejecting means.

According to a fourth aspect of the present invention, in the apparatus for removing carbon adhering to the inlet of a coke oven according to the third aspect, the hard powder and granular material ejecting means ejects high-pressure gas that reacts with the hard powder and the high temperature carbon. It has a special feature.

[0015]

The present invention employs the conventional air (O ₂ ) combustion burning method with poor removal efficiency and the mechanical structure for direct scraping as a means for removing the carbon adhering to the inside of the furnace, especially the charging port. No, the above claims 1 to 4
By adopting the means described in (1), the following effects (1) to (3) improve the efficiency of removing the adhering carbon, and the carbon can be removed without adversely affecting the operation, particularly the brick.

Since the hard powder and granules are jetted toward the carbon adhering to the furnace by the hard powder and granule jetting means, the carbon can be efficiently removed and removed without damaging the brick of the furnace.

Since the high-pressure gas that reacts with the high temperature carbon along with the hard powder is injected to the adhered carbon layer, the carbon can be efficiently removed and removed without damaging the brick of the furnace.

As a device function, by disposing the hard powdery or granular material ejecting means so as to be able to swivel and ascend and descend at the charging port portion, the efficiency of removing adhered carbon is improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the apparatus and method of the present invention will be described with reference to the drawings by embodiments.

FIG. 1 is a front view showing a coke oven inlet adhering carbon removing device according to one embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is a side view showing the basic structure of the device.

The adhering carbon removing device according to the present invention comprises a powder / particle injection nozzle mechanism A and a blast generating mechanism B. The coke oven 1 has an oven wall (ceiling) 1A and an oven wall 1A.
It is composed of a carbonization chamber 1C on the lower side, and a charging port 1B provided to penetrate the furnace wall 1A to the carbonization chamber 1C. The powder / particle injection nozzle mechanism A includes a powder / particle injection nozzle 2, and the nozzle 2 can be inserted into the charging port B. The nozzle 2 is held on the main body base 10 by the nozzle holder 3, and the tilt angle is variable by the nozzle tilt cylinder 4. A blast supply hose 7 is connected to the rear of the holder 3 and is connected to a blast generating mechanism B which is a supply source of hard particles. Blast generator B
Is composed of a hopper 8a for storing and cutting out the granular material and a compressor (compressor) 8b for pressurizing high-pressure gas. 11 is a hose reel. Further, in the powder / particle injection nozzle mechanism A, the nozzle drive mechanism 5 that allows the nozzle 2 to move freely along the shape of the charging port 1B.
And an in-furnace monitoring camera 6 capable of confirming the removal state of adhered carbon. In the present embodiment, the nozzle drive mechanism 5 (the drive source is a motor) is provided with two units for movement in two directions of the X direction (5a) and the Y direction (5b), and with respect to the loading port B, front and rear and left and right. Can be moved. Furthermore, the nozzle 2
Has a structure that can be inserted into and lifted (pulled out) from the charging port B via the moving chain 9.

Further, in the deposited carbon removing apparatus of this embodiment, a high-pressure gas that reacts with high-temperature carbon is provided so that it can be jetted from the powder / particle spray nozzle 2, and the high-pressure gas and the hard powder / granulate are supplied from the nozzle 2. Both and at the same time, it is possible to inject the carbon that has adhered to the charging port 1B to be removed.
As another configuration, a nozzle for injecting the high-pressure gas (not shown) may be provided, and a means for ejecting the nozzle 2 and the other nozzle to the adhered carbon at the same time may be adopted.

A suitable mixture of coke powder and abrasive material [blast material (sand, blast furnace slag, etc.)] is suitable as the hard powder. In the present example, the hard powder particles described above were used. The abrasive material (blast material) has a sharp grain shape and is hard, and the hard powder granules obtained by mixing such abrasive material (blast material) and coke powder are mainly used in the present invention. The efficiency was good.

As the additional gas for activating the carbon, (a) carbon dioxide (CO ₂ ) -containing gas and / or (b) water vapor are used as a high-pressure gas injected to further improve the efficiency of removing adhered carbon. A containing gas (hydrogenation reaction) or the like is suitable, and carbon removal and stripping efficiency are improved. In this example, since the above-mentioned additional gas was used, carbon removal and peeling efficiency were good. The reaction formulas of (a) carbon dioxide (CO ₂ ) -containing gas and (b) water vapor-containing gas (hydrogenation reaction) are as follows. (a) C + CO ₂ → CO + CO (CO ₂ ) (b) C + H ₂ O → CO + H ₂ As described above, CO ₂ , steam, etc. are used as the additional gas. Since there is a high-temperature gas containing it, it is good to use this.

Further, FIG. 4 shows the carbon removing performance according to one embodiment of the method of the present invention by the relationship between the blast pressure and the removing efficiency. It can be seen from FIG. 4 that the carbon removal efficiency sharply improves when the blast pressure (gas pressure) is 7 kgf / cm ² or more.

[0026]

As described above, according to the present invention, the removal performance is about twice as high as that of the conventional air combustion burn-off method, and the punching work by a manual bar and the burn-off by air combustion are performed. The risk of work and work environment problems are solved, the adhered carbon can be removed safely and reliably in a short time, heavy work is eliminated, the amount of dry distillation heat is reduced (about 3 Mcal / T) and the quality of coke is improved by a coke oven. Can be implemented without obstructing the furnace wall of
Operationally beneficial, thus providing industrially useful effects.

[Brief description of drawings]

FIG. 1 is a front view showing a coke oven inlet adhering carbon removing device according to an embodiment of the present invention.

FIG. 2 is a side view showing the coke oven inlet adhering carbon removing device according to one embodiment of the present invention.

FIG. 3 is a side view showing a basic configuration of a carbonization device for adhering carbon to the inlet of a coke oven according to an embodiment of the present invention.

FIG. 4 is a graph showing the relationship between blast pressure and carbon removal efficiency.

FIG. 5 is a sectional view showing Prior Art 1.

FIG. 6 is a plan view showing Prior Art 1.

FIG. 7 is a sectional view showing Prior Art 2.

[Explanation of symbols]

 A powder / particle injection nozzle mechanism B blast generation mechanism 1 coke oven 1A furnace wall (ceiling) 1B charging port 1C carbonization chamber 2 powder / particle injection nozzle 3 nozzle holder 4 nozzle tilt cylinder 5 nozzle drive mechanism 6 furnace monitoring camera 7 blast Supply hose 8a Hopper 8b Compressor (compressor) 9 Nozzle moving chain 10 Main body base 11 Hose reel 12 Fluid pipe 13 Air nozzle 14 Adhering carbon 15 Charging car 16 Scraping scraper 17 Rotating shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Mukaihata, Fukuyama City, Fukuyama City, Hiroshima Prefecture, Ichibanchi Fukuyama Kyodo Machinery Co., Ltd. (72) Inventor, Yuichi Nakao, Fukuyama City, Fukuyama City, Hiroshima Prefecture Fukuyama Kyodo Machinery Company

Claims (4)

[Claims] 1. A method for removing adhered carbon at a coke oven charging port, comprising removing hard carbon in a furnace by injecting a hard granular material toward a carbon layer adhered in a furnace by a hard powder injection means. A characteristic method for removing carbon adhering to the inlet of a coke oven. 2. A method for removing adhered carbon at the inlet of a coke oven, comprising injecting a high-pressure gas that reacts with the hard powder and high-temperature carbon toward the adhered carbon layer in the furnace by means of a hard powder injection means. A method for removing carbon adhering to the inlet of a coke oven, which comprises removing carbon adhering to the inside of the furnace. 3. An apparatus for removing adhered carbon at the inlet of a coke oven, comprising hard powder / injection means for injecting hard particles / particles for removing carbon in-furnace toward an in-furnace carbon layer. A device for removing carbon adhering to the inlet of a coke oven. 4. The apparatus for removing carbon adhering to the inlet of a coke oven according to claim 3, wherein the hard powder and granular material ejecting means ejects a high-pressure gas that reacts with the hard powder and granular material and the high temperature carbon.