JP5560676B2 - Coke extrusion equipment - Google Patents

Description

  The present invention relates to a chamber-type coke oven (hereinafter simply referred to as a “coke oven”) having a heat storage chamber at the lower part of the furnace body and alternately arranged with combustion chambers and carbonization chambers in the upper part. Regarding coke extrusion equipment for extruding coke generated by carbonization from a carbonization chamber, in particular, reducing the extrusion load, reducing damage to the furnace wall (side wall) of the carbonization chamber, and extending the life of the furnace wall. The present invention relates to a coke extrusion device that can perform the above.

  In the coke oven, when coke (coke lump) generated by carbonizing coal in the carbonization chamber is pushed out from the carbonization chamber using an extrusion device, the coke is clogged in the carbonization chamber, resulting in an increase in the extrusion load. As a result, a large force acts on the furnace wall of the coke oven carbonization chamber, and the furnace wall may be damaged. If the clogging is severe, the furnace wall will be destroyed, or it will be impossible to extrude coke with an extrusion device, and the coke must be scraped out manually after the furnace temperature is lowered. When clogging occurs in this way, the repair cost of the furnace wall increases, and the production amount is inevitably reduced by stopping the furnace.

  In order to reduce the extrusion load and prevent damage to the furnace wall against such a problem, the coke lump of the extrusion device is pressed against the coke lump in the coking chamber of the coke oven to push out the coke lump from the carbonization chamber. At this time, a coke extrusion technique is known in which extrusion is performed while applying vibration to the coke mass (see, for example, Patent Document 1).

  FIG. 5 is a side view showing an example of a coke extrusion device described in Patent Document 1. As shown in FIG. The coke pushing device 50 includes a pushing ram 51 including a ram rod 52 and a ram head 53 and a pushing ram driving device (not shown), and pushes the ram head 53 pressed against the coke lump 12 in the carbonization chamber 11. The abutting surface is divided into three abutting surfaces of an upper abutting surface 53a, an intermediate abutting surface 53b, and a lower abutting surface 53c in the vertical direction, and an intermediate abutting surface (vibration plate) among them. A vibration machine (vibration motor or hydraulic vibration machine or the like) 54 for vibrating 53b in the push-out direction via a vibration rod 55 is attached to the ram rod 52.

  Then, using the coke pushing device 50 configured as described above, the vibration is applied to the intermediate pressing surface (vibrating plate) 53b in the pushing direction by the shaker 54 to impart vibration to the coke lump 12. By advancing the ram head 53 in the direction indicated by the white arrow in FIG. 5, the friction between the coke lump 12 and the furnace wall of the carbonization chamber 11 changes from static friction to dynamic friction, thereby reducing the coefficient of friction. Extrusion load is reduced. As a result, damage to the furnace wall can be suppressed.

JP 2006-206898 A

  However, the coke extrusion apparatus 50 described in Patent Document 1 as shown in FIG. 5 has the following problems.

  Since the ram beam 52 is inserted into the carbonization chamber 11, the width is only about 350 mm, and peripheral equipment is designed accordingly. Therefore, in order to prevent the shaker 54 from coming into contact with peripheral equipment, the shaker 54 cannot protrude beyond this width. On the other hand, the excitation force necessary for applying an appropriate vibration to the coke lump 12 is several hundred kN.

  However, there is no conventional shaker that can generate such an excitation force, and there is no compact shaker that fits in a width of about 350 mm. Need to do. In addition, when the excitation force is several hundred kN, there is a problem of fatigue failure.

  Further, since the installation location is limited depending on the structure of the vibration exciter 54, it is not possible to follow the entire travel range of the ram 51, and it is necessary to separate from the ram beam 52 on the way, so vibration is applied throughout the push stroke. I can't.

  In addition, a large excitation force from the vibration exciter 54 is transmitted from the rear to the pressing surface (vibration plate) 53b at the tip of the ram 51, but the vibration transmission member (vibration rod) 55 is always large. Vibration force is applied and high strength is required.

  The present invention has been made in view of such circumstances, and as a coke extrusion device that pushes the ram head at the tip of the ram against the coke lump in the carbonization chamber of the coke oven and pushes the coke lump out of the carbonization chamber, a major facility modification An object of the present invention is to provide a coke extrusion device that can effectively impart vibration to a coke mass with a compact structure without performing the above.

  In order to solve the above-mentioned problems, the present inventors considered generating a large excitation force with a compact, small-output vibration exciter. For this reason, the resonance phenomenon is used to increase the small vibration.

  Based on this idea, the present invention has the following features.

  [1] In a coke extrusion apparatus for extruding a coke lump in a carbonization chamber of a coke oven, a diaphragm that contacts the coke lump and transmits vibrations to the coke lump, a weight connected to the diaphragm with a spring, and a weight connected to the weight A coke extrusion device comprising: a vibration exciter.

  [2] The method according to [1], wherein the vibration is transmitted to the coke block by amplifying a vibration force of a vibration device connected to the weight by using resonance between the weight and the spring. Coke extrusion equipment.

  [3] The coke extrusion device according to [2], wherein the vibration force of the vibration device is amplified five times or more to transmit vibration to the coke mass.

  In the present invention, by utilizing the resonance phenomenon, a large excitation force can be generated with a compact small-output vibration exciter. Therefore, the exciter becomes compact enough to be installed in the ram beam, and by using the exciter, appropriate vibrations can be imparted to the coke mass without greatly modifying the current coke extrusion device. Can do. Further, it is not necessary to disconnect the vibrator from the ram beam in the middle, and it is possible to vibrate over the entire pushing stroke.

It is a figure which shows one Embodiment of this invention. It is a figure for demonstrating the resonance in a mass spring system. It is a figure for demonstrating the resonance in a mass, a spring, and a viscous damping system. It is a figure which shows the vibration magnification in a mass, a spring, and a viscous damping system. It is a figure which shows a prior art (patent document 1).

  In the present invention, by utilizing the resonance phenomenon, a large excitation force can be generated with a compact, small-output vibration exciter.

  As the simplest example of the resonance phenomenon, a primary mass-spring system shown in FIG. 2 is well known.

  In this case, assuming that the mass of the vibrating body is M and the spring constant is K, the resonance frequency f and the resonance angular frequency ωn are given by the following equation (1), and the amplitude at resonance is infinite.

  In reality, there are many systems (mass / spring / viscous damping system) including the viscous damping element shown in FIG.

  In this case, assuming that the viscous damping coefficient is C, the resonance frequency f, the resonance angular frequency ωn, and the amplitude magnification A at resonance are given by the following equations (2) and (3). Here, ζ is an attenuation ratio, and is expressed by equation (4).

  Here, as an example, FIG. 4 shows the relationship between the external force frequency fp and the vibration magnification Ap due to the difference in the damping ratio ζ. FIG. 4 shows that the amplitude magnification A at resonance (here, external force frequency fp≈60 Hz) becomes 10 by setting the damping ratio ζ to about 0.05. That is, a force 10 times the applied force is generated. In other words, the applied force is amplified 10 times.

  Therefore, for example, when an excitation force of 100 kN is required, the output from the shaker may be 10 kN. In order to obtain this 10 kN with a vibrator (vibration motor), it is only necessary to use two vibrators with an output of 5 kN, and there are those with a total width of about 300 mm.

  In the present invention, the above knowledge is applied to a coke extrusion apparatus, and as an embodiment, a coke extrusion apparatus 20 shown in FIG. 1 has been conceived.

  As shown in FIG. 1, a coke extrusion device 20 according to this embodiment includes an extrusion ram 21 including a ram rod 22 and a ram head 23, and an extrusion ram driving device (not shown). A diaphragm 23 a that contacts the coke lump 12 in the carbonization chamber 11 and transmits vibration to the coke lump 12, a weight 26 connected to the diaphragm 23 a by a spring 27 and a viscous damping element 29, and a vibration transmitting member 25 on the weight 23. And a spring 28a, 28b installed between the diaphragm 23a and the ram head 23 in order to press the diaphragm 23a against the coke lump 12.

  The viscous damping element 29 is not particularly required, and the damping effect inherent to the spring 27 and the coke pushing device 20 as a whole is used instead.

For example, when the excitation force applied to the coke lump 12 is 100 kN, the excitation frequency fp is 50 Hz, the mass M of the weight 26 is 1000 kg, and the damping ratio ζ is 0.05, the above formulas (2) to (4) Based on the equation, by using a spring having a spring constant K of 1 × 10 ⁸ N / m as the spring 27, the amplitude magnification A at the time of resonance (resonance frequency f≈50 Hz) becomes 10, and the 10 kN vibrator 24 Thus, an excitation force of 100 kN that needs to be applied to the coke lump 12 can be obtained.

  Further, the vibration transmission member 25 that connects the vibration generator 24 and the weight 26 only needs to transmit an excitation force that is 1/10 of the excitation force applied to the coke lump 12, and can be a low-strength member. Since the vibration exciter 24 is vulnerable to heat, it is desirable to install it at the rear end of the ram rod 22 as much as possible, and the length of the vibration transmitting member 25 becomes longer, but the design is facilitated by reducing its strength.

  In this way, in this embodiment, a large excitation force can be generated by the compact small-output vibration exciter 24 by utilizing the resonance phenomenon. For example, a vibration force amplified to 100 kN can be obtained from the vibration generator 24 of 10 kN. Accordingly, the vibration exciter 24 is compact enough to be installed in the ram beam 22. By using the vibration exciter 24, an appropriate vibration can be applied to the coke lump 12 without greatly modifying the current coke extrusion device. Can be granted.

  Further, when the coke is jammed, the diaphragm 23a is firmly fixed, the weight 26 and the spring 27 start to resonate, energy is accumulated, the excitation force increases, the clogging is eliminated, and the object is achieved. When clogging does not occur, the diaphragm 23a is not strongly pressed against the coke, and resonance does not occur or the scale becomes small. Therefore, the excitation force does not increase and the mechanical load is not increased carelessly. Convenient. As a result, even if vibration is always started at the start of extrusion, the excitation force does not increase unless clogging occurs. Sometimes it is convenient to keep shaking at all times to prevent clogging.

DESCRIPTION OF SYMBOLS 11 Coking oven carbonization chamber 12 Coke lump 20 Coke extrusion device 21 Extrusion ram 22 Ram rod 23 Ram head 23a Diaphragm 24 Excitation device (vibrator)
25 Vibration transmission member 26 Weight 27 Spring 28a, 28b Spring 29 Viscous damping element 50 Coke pushing device 51 Pushing ram 52 Ram rod 53 Ram head 53a Upper pushing surface 53b Intermediate pushing surface (vibration plate)
53c Lower pushing 54 Exciter 55 Exciting rod

Claims (2)

In a coke extrusion apparatus for extruding a coke mass in a carbonization chamber of a coke oven, a diaphragm that contacts the coke mass and transmits vibrations to the coke mass, a weight connected to the diaphragm with a spring, and an excitation connected to the weight With the device ,
The coke extrusion device is characterized in that, using the resonance between the weight and the spring, the vibration device amplifies the vibration force of the vibration device connected to the weight and transmits the vibration to the coke mass . 2. The coke pushing apparatus according to claim 1 , wherein a vibration force is transmitted to the coke lump by amplifying a vibration force of the vibration exciting apparatus by 5 times or more.

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