JP2011121999A - Oven outlet structure of coke oven and method for producing coke therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing coke, which enables to prevent the falling of hardware, reduce repairing frequency and works, achieve the protection of a coke oven body for a long period, and stably efficiently produce the coke for a long period. <P>SOLUTION: The oven outlet structure of the coke oven of form in which the door frame of an oven lid is protected with a protection plate tightened with a backstay is characterized in that a space surrounded with a protection ledge 37, a protection plate 38, a head plate 34, and a door frame 35 exists on the combustion chamber side of the oven outlet portion, and a method for stably producing coke for a long period with the same. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure of a kiln capable of supporting a furnace brick without causing the kiln metal fitting of the coke oven to loosen or fall off even under the influence of coke extrusion load or heat load due to operation, and coke using the same. It relates to a manufacturing method.

  FIG. 4 shows a partial cross-sectional plan view of the front side of the chamber type coke oven. The chamber-type coke oven 1 is configured by arranging a number of combustion chambers 31 and carbonization chambers 32 alternately in the furnace width direction. Furnace body hardware is a general term for hardware that covers and supports the surface of the furnace body brick, and includes a door frame 35 that forms a furnace port of the carbonization chamber, a protection ledge 37 that holds the brick in the combustion chamber, a head plate 34, and a flash plate 33. Furthermore, it consists of the upper wall plate and lower wall plate that hold down the upper and lower bricks of the combustion chamber and carbonization chamber (hereinafter referred to simply as “hardware” may refer collectively or individual hardware) ). During normal operation, these furnace body hardware is supported by the backstay 2 and is fastened by a tension rod disposed at the top or bottom of the furnace to hold the furnace body.

  In the chamber type coke oven 1, the carbonization chamber 32 and the combustion chamber 31 have a height of about 8 to 10 m, and the bricks in this portion hold a high temperature exceeding 1000 ° C. necessary for coal carbonization inside. Therefore, the temperature of the furnace body hardware also becomes high, so that during the operation of the coke oven for a long time, deformation of the hardware itself or deformation of the backstay 2 occurs, the hardware falls off, and finally the furnace body brick collapses. May occur.

  On the other hand, the current coke oven life exceeds 40 years, and furnace brick wear and deterioration of furnace hardware are increasing. However, since the construction of a coke oven requires enormous costs, it is aimed to achieve cost reduction by extending the coke oven life. For this reason, the soundness of the furnace body has been maintained by exchanging the deformed backstay 2 and door frame 35 and repairing or exchanging loose or fallen hardware.

  Most of the looseness of the metal in the coke oven is caused by the deformation of the backstay 2 and the door frame 35, and is partially damaged and protrudes to the carbonization chamber 32 side. Arise. In such a case, repair is usually performed by filling mortar into the part where the hardware has dropped off, but this is only a temporary measure, and the situation gradually deteriorates. Under such circumstances, Patent Document 1 discloses a technique for removing the backstay 2 and fixing the hardware.

JP 2002-3851 A

  It is necessary to remove the backstay 2 for exchanging hardware. If such repair work is performed, the tightening force of the entire furnace body is reduced, and the furnace body temperature is lowered. A new problem arises with risk. Moreover, the operation | work which removes the backstay 2 becomes very big as shown in patent document 1, and there exists a problem of the increase in the cost for it, and the number of days required for repair.

  The present invention provides a method for preventing the falling of hardware, reducing the frequency of repairs and reducing work, achieving protection of the furnace body of the coke oven for a long period of time, and producing coke efficiently and stably for a long period of time. To do.

  The inventors have intensively studied in order to prevent the protection ledge 37 from being loosened and being displaced from its original position and falling off, among other hardware. Therefore, the protection ledge 37, the protection plate 38, the head plate 34, and the protection ledge 37, so that even when the protection plate 38 and the head plate 34 are distorted, the distortion can be absorbed by the space and the protection ledge 37 can be prevented from falling off. It has been found that it is effective to provide a space surrounded by the door frame 35, or a space surrounded by the protection ledge 37, the protection plate 38, and the head plate 34.

The present invention provides the following kiln structure and coke manufacturing method in order to prevent the protection ledge 37 from falling off and to achieve a reduction in repair frequency and work.
(1) In a coke oven of a type in which the door frame of the furnace lid is protected by a protective plate fastened by a backstay, it is surrounded by a protection ledge 37, a protection plate 38, a head plate 34, and a door frame 35. The coke oven structure of the coke oven is characterized in that a space to be present is present on the combustion chamber side of the kiln entrance.
(2) In a coke oven in which the door frame of the furnace lid is protected by a protective plate fastened by a backstay, a space surrounded by the protection ledge 37, the protection plate 38, and the head plate 34 is a kiln opening. A coke oven kiln structure characterized by being present on the combustion chamber side of the section.
(3) The coke oven furnace structure according to (1) or (2), wherein the space is filled with amorphous mortar.
(4) A long-term stable production method of coke characterized by using a coke oven having the kiln structure described in (1) to (3).

The coke oven structure of the coke oven according to the present invention can absorb distortion even when a coke extrusion load is applied, can prevent hardware from falling off, can reduce the repair frequency and work, and can achieve the protection of the furnace body. There is.
Further, the coke production method according to the present invention has an advantage that a coke oven can be efficiently produced stably for a long period of time.

The top view which shows the kiln structure of a comparison. The top view which shows an example of the kiln opening structure which concerns on embodiment of this invention. The top view which shows an example of the kiln opening structure which concerns on embodiment of this invention. The partial top view of a coke oven.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Here, FIG. 1 shows a comparative kiln structure in which the present invention is not applied. In a coke oven of the type in which the door frame 35 of the furnace lid is held by a protective plate fastened by the backstay 2, there is substantially no space between the protection plate 38 and the head plate 34 with the protection ledge 37. It is buried. After a certain period of use, the protection plate 38 and the head plate 34 are distorted, and after a certain period of use, the protection ledge 37 is deformed or dropped to the carbonization chamber 32 side, It became necessary to repair.
Here, the protective plate represents a general hardware when attention is paid to the functions of the flash plate 33 and the head plate 34.

  Therefore, in the present invention, as shown in FIG. 2, a space 39 surrounded by the protection ledge 37, the protection plate 38, the head plate 34, and the door frame 35 exists on the combustion chamber side of the kiln opening portion. Alternatively, as shown in FIG. 3, a space 39 surrounded by the protection ledge 37, the protection plate 38, and the head plate 34 exists on the combustion chamber side of the kiln opening.

  These spaces 39 may be filled with irregular mortar. Filling with an irregular mortar has the effect of facilitating the installation of hardware.

  When the space is provided in this way, the distortion of the protection plate 38 and the head plate 34 during long-term use is absorbed, and the protection ledge 37 does not loosen or fall to the carbonization chamber 32 side. It was confirmed that there was no projecting to the side. Here, the existence of the space 39 suffices if there is a gap that does not cause contact between the metal objects in the steady state of coke production and use, and the distortion of the protection plate 38 and the head plate 34 is absorbed, and the protection ledge 37 is carbonized. There will be no loosening or falling to the chamber 32 side.

  In addition, by producing coke using the coke oven having the kiln structure according to the present invention, the period for repairing the coke oven is shortened, and coke can be efficiently produced stably for a long period of time.

  Therefore, from the above knowledge of the inventors, a coke oven in which a space surrounded by the protection ledge 37, the protection plate 38, the head plate 34, and the door frame 35 exists on the combustion chamber side of the kiln opening portion. If it is the kiln opening structure of this, Embodiment of this invention is not restricted to the kiln structure of FIG. 2, There are various structures. Similarly, if the space surrounded by the protection ledge 37, the protection plate 38, and the head plate 34 is a coke oven structure having a coke oven in the combustion chamber side of the kiln opening, The embodiment is not limited to the kiln structure shown in FIG.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to this Example.

  Coke was produced for 2 months using a coke oven having the specifications shown in Table 1 having various kiln structure, and the state of deformation of the kiln structure was observed over time. As shown in FIG. 2, the first invention example has a space surrounded by the protection ledge 37, the protection plate 38, the head plate 34, and the door frame 35 on the combustion chamber side of the kiln opening. The structure is the same.

Further, as Example 2 of the present invention, as shown in FIG. 3, a space surrounded by the protection ledge 37, the protection plate 38, and the head plate 34 exists on the combustion chamber side of the kiln opening. There was a structure filled with amorphous mortar in the space.

  Comparative Example 1 has the kiln structure shown in FIG. 1, and the space between the protection plate 38 and the head plate 34 is filled with a protection ledge 37.

  In all the examples, the amount of deformation of the kiln was compared using a coke oven having the conventional kiln structure shown in FIG. The state of the deformation of the kiln is defined as zeroing the amount of projection of the initial protection ledge 37 in which each kiln structure is newly installed to the carbonization chamber side, and then stretching the protection ledge 37 to the carbonization chamber side after two months of operation. The output was measured with a laser displacement meter. Table 2 shows relative values for each example of each kiln structure when the overhang amount of Comparative Example 1 is 1. Table 2 shows the relative values for each example of each kiln structure when the current value applied to the extruder is measured for the coke extrusion load and the extrusion load (current value) of Comparative Example 1 is 1. As described above, the state of deformation / loosening of the kiln structure and the falling of the hardware was also indirectly evaluated from the extrusion load (current value).

  As shown in Table 2, compared with the comparative example, in the example of the present invention, the overhang amount of the protection ledge 37 toward the carbonization chamber is small, so that the load at the time of coke extrusion is reduced, and the repair frequency and work are further reduced. The effect was recognized. That is, in the example of the present invention, coke could be stably produced for a long time.

DESCRIPTION OF SYMBOLS 1 Chamber furnace coke oven 2 Backstay 31 Combustion chamber 32 Carbonization chamber 33 Flash plate 34 Head plate 35 Door frame 36 Hook bolt 37 Protection ledge 38 Protection plate 39 Space or irregular-shaped mortar C The inner surface of the door wall of a carbonization chamber

Claims (4)

  In a coke oven in which the door frame of the furnace lid is protected by a protection plate fastened by a backstay, a space surrounded by the protection ledge 37, the protection plate 38, the head plate 34, and the door frame 35 is formed. A coke oven structure of the coke oven, which exists on the combustion chamber side of the kiln port.   In a coke oven of a type in which the door frame of the furnace lid is protected by a protective plate fastened by a backstay, a space surrounded by the protection ledge 37, the protection plate 38, and the head plate 34 is burned in the kiln opening. A coke oven kiln structure characterized by being on the chamber side.   The coke oven kiln structure according to claim 1 or 2, wherein the space is filled with amorphous mortar.   A coke oven having a kiln structure according to any one of claims 1 to 3, wherein the coke oven has a long-term stable production method.

Images