JP2001200258A - Method and apparatus for removing carbon in coke oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strongly scrape carbon in a coke oven by attaching a scraping plate to the ram shoe of a pushing machine and simultaneously ensure safety when an overload is applied. SOLUTION: A scraping plate 1 for scraping carbon 51 on the coke oven bottom is attached to the rear end of the ram shoe 23 of a coke oven pushing machine. The scraping plate is divided into a plurality of sections along the width direction of a coke oven, and cuts 4 for breaking the plate when an overload is applied are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for removing carbon from a coke oven.

[0002]

2. Description of the Related Art Heretofore, carbon removal from a coke oven has been performed manually or by dedicated mechanical power. Also,
Japanese Utility Model Laid-Open No. 55-139143 discloses a device for removing coke and the like. In this apparatus, the upper end of an L-shaped arm is vertically movably attached to the lower part of the ram shoe of the coke extruder through an elongated hole, and a wheel that contacts the bottom of the carbonization chamber is provided at the lower end of the L-shaped arm. At the same time, a scraper is fixed to the lower part of the position facing the wheel so that the lower surface thereof is slightly higher than the contact surface of the wheel in the carbonization chamber, and the L-shaped arm is swung toward the ram shoe by the ram shoe. This is a device for removing coke and the like from a coke oven provided with rollers protruding to prevent the occurrence of coke. This technique describes removal of coke and tar, but does not describe removal of carbon firmly adhered to a coke oven. That is, in this technique, if there is a fixed substance, the scraper escapes, so that the gradually growing fixed substance cannot be removed.

[0003]

[0009] Removing carbon in a coke oven manually requires a harsh working environment for coke oven operators and poses a safety problem. on the other hand,
The introduction of a mechanical dedicated device has a problem in investment costs. In addition, there is a problem in that the operation time for removing the carbon attached to the furnace floor hearth is added because the carbon removal work is performed manually or by mechanical power, so that the operation time per kiln is extended and the production efficiency is impaired. .

In the present invention, a scraper for removing carbon is attached to the extruder-side end of the ram shoe of the ram beam of the extruder, and the carbon adhered to the furnace hearth is strongly removed during the retreat process after the completion of the coke extrusion of the ram beam. A method and an apparatus are provided to prevent the growth of carbon deposition. On the other hand, since this device enters the furnace, there is a risk of damage to the furnace body equipment such as bricks and furnace hardware, so if excessive scraping force is applied to the scraper, the scraper body will bend. It is an object of the present invention to provide a technique for preventing damage to a furnace body by protecting the furnace body equipment.

[0005]

SUMMARY OF THE INVENTION The present invention has been developed in view of the above circumstances, and adheres and grows on a hearth near a mouth of a coke oven by a scraper attached to a rear end of a ram shoe of a coke extruder. A carbon removing method for a coke oven characterized by retracting a scraping plate against overload when scraping carbon. Coke extruder
A ram beam is provided, and a ram shoe for supporting the ram beam is provided. According to the method of the present invention, when carbon is scraped off by a scraping plate attached to the rear end of the ram shoe, the scraping plate is retracted when an overload exceeding a predetermined force is applied to the scraping plate.

[0006] The apparatus of the present invention which can suitably carry out the above method is provided with a scraping plate for scraping off deposits on the bottom surface of the coke oven at the rear end of the ram shoe of the coke oven extruder. A carbon removing device for a coke oven characterized in that a weakened portion is provided on a scraping plate which is divided into a plurality of pieces in the width direction and which is broken when a set force acts on each of the divided scraping boards. It is preferable that the weakening portion is a notch provided in the scraper body, or a shearing member that supports a scraper that is swingably formed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows a side view of the extruder ram head. The ram head 21 extrudes coke in a coke oven, and is propelled through a ram beam 22 by an extruder (not shown). The scraping plate 1 of the present invention is attached to the rear end of the ram shoe 23 that moves on the hearth while supporting the ram beam, and scrapes carbon that adheres and grows on the hearth in the return process of the extruder.

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a side view showing a state of a scraping plate operated by overload, and FIG.
FIG. 2 is a plan view of FIG. As shown in FIG.
The scraper body 3 is attached to an attachment portion 2 attached to the rear end of the scraper 3. The lower end 5 of the scraper body 3 is a scraper for scraping off the carbon 51 adhering to the inside of the furnace 50, and a cutout 4 is formed in a part thereof. After the coke extrusion operation is completed, the scraping plate 1 scrapes and removes the carbon 51 when the scraper 1 passes through the furnace mouth hearth during the retreating process of the ram head 21 after the coke extrusion operation is completed.

The scraping plate 3 is divided into a plurality of pieces in the coke oven width direction as shown in FIG. In FIG. 3, it is divided into three. When the overload acts on the scraping plate 3, the notch 4
As shown in FIG. 6, the lower end of the scraping plate 3 is formed to have a retractable size, which is a weakened portion. The position and size of this notch are designed so that, for example, when a predetermined stress within a range that does not damage the furnace body acts on the scraper based on the maximum value of the thrust of the extruder, the scraper bends or retracts. Can be determined by

FIG. 4 shows a scraping plate 11 according to another embodiment, in which a pin 1 is attached to a mounting portion 12 mounted on a ram shoe 23.
6 comprises a jig 13 rotatably mounted. The jig 13 is prevented from rotating by the shearing member 14, and when an overload is activated, the shearing member 14 is sheared and rotated. The stopper 15 limits the appropriate amount of rotation of the jig 13 and rotates to, for example, the posture indicated by 13a.

A test apparatus 31 shown in FIGS. 6 and 7 was manufactured as a trial and temporarily installed in an extruder of an actual coke oven to conduct a test. 6 and 7, when a strain gauge 33 was attached to the front of the scraping plate 32 and a test was conducted in a large number of coke oven chambers, the minimum acting force acting on three scraping plates in the furnace width direction was 20 to 50 k.
gf (196-490N), maximum working force is 388kgf
４２421 kgf (3805 to 4129N). As a result of this test, it was possible to reliably remove the carbon from the kiln hearth, eliminating the need for manual maintenance of the kiln hearth or a special machine, and further suppressing the furnace lid attachment failure due to the carbon attached. Stable operation can be guaranteed.

[0012]

According to the present invention, it is possible to eliminate heavy muscle work by human power, and it is a simple device, so that investment costs can be reduced. In addition, a strong scraping force can be secured, and the operation time per kiln is not extended due to the simultaneous progress with the coke extrusion operation. further,
Safety when excessive force is applied can be sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a side view showing bending of a scraping plate due to overload in the embodiment.

FIG. 3 is a plan view of the embodiment.

FIG. 4 is a side view of another embodiment.

FIG. 5 is a side view of a coke extruder ram head.

FIG. 6 is a front view of the test apparatus.

FIG. 7 is a side view of the test apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 scraping plate 2 mounting portion 3 scraping plate main body 4 notch 5 lower end portion 11 scraping plate 12 mounting portion 13 jig 14 shearing member 15 stopper 16 pin 21 ram head 22 ram beam 23 ram shoe 31 test apparatus 32 scraping plate 32 strain gauge 50 coke oven 51 carbon

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taiga Honma 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Co., Ltd. F-term in the Chiba Works (reference) 4H012 FA05

Claims (3)

[Claims] 1. A scraping plate attached to a rear end of a ram shoe of a coke extruder scrapes carbon that adheres and grows on a hearth near a mouth of a coke oven. A carbon removing method for a coke oven, wherein the scraping plate is retracted. 2. A coke oven extruder is provided with a scraper at the rear end of the ram shoe for scraping off deposits on the bottom surface of the coke oven. The scraper is divided into a plurality of pieces in the coke oven width direction and a set force is applied to each of the divided pieces. A carbon removing device for a coke oven, wherein a weakened portion which is broken when acting on the scraped plate is provided on the scraped plate. 3. The apparatus for removing carbon from a coke oven according to claim 2, wherein said weakening portion is a notch provided in a scraping plate or a shearing member for supporting a scraping plate formed swingably.