JP2008303239A - Method for estimating load required to extrude coke in coke oven - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for estimating a load required to extrude coke in a coke oven by considering an influence of the wall unevenness of the coke oven to be exerted on the load required to extrude the coke and using oven wall profile information since the load is affected by a shape and a position of the wall unevenness. <P>SOLUTION: The oven wall profile in a carbonization chamber of the coke oven is set. The carbonization chamber is divided in the longitudinal direction of the coke oven into a section of the even oven wall and a section of the uneven oven wall on the basis of the oven wall profile. The coke cake in the carbonization chamber is also divided into a plurality of component zones. Whether the coke cake in each component zone exists in the section of the even oven wall or the section of the uneven oven wall is discriminated. The extrusion force required to move the coke cake, which exists in each component zone and in the section of the even or uneven oven wall, at a predetermined speed is calculated by exerting the reaction force corresponding to the position of each component zone in the longitudinal direction of the coke oven on the coke cake from both of the coke extrusion side and its opposite side. The load required to extrude the whole coke cake from the carbonization chamber is estimated on the basis of the calculated extrusion force in each component region. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for estimating a coke extrusion load when coke extrusion is performed in, for example, a horizontal chamber type coke oven, particularly when the furnace wall is uneven.

Stable operation of the coke oven is important from the viewpoints of securing production volume, reducing manufacturing costs, and protecting the furnace body. However, in reality, troubles occur due to various reasons, and it is often impossible to maintain stable operation.
FIG. 10 schematically shows a state when the coke cake 31 is extruded from the carbonization chamber of the coke oven 30. For example, when the coke is extruded from the carbonization chamber of the coke oven 30, the load on the ram 32 of the extruder is increased. There is a problem that it rises abnormally and it becomes impossible to discharge coke.
Further, when the coke is extruded, a part of the pushing force by the ram 32 is applied to the furnace wall 33 as a side pressure. The load at this time becomes larger as the force required to extrude the coke becomes larger, causing troubles such as damage to the furnace wall.

  When the coke is pushed by the ram 32 of the extruder, if the state of the furnace wall brick surface of the carbonization chamber is normal and the coking state of the coke is normal, an abnormal extrusion load is applied to the ram. Absent. However, in the carbonization chamber of a coke oven, there are many cases where the furnace wall carbon adheres to the furnace wall 33 to form a convex part 34, or the furnace wall is damaged to form a concave part 35. In such a case, the concavo-convex portion becomes resistance to coke extrusion, and the coke extrusion load by the ram increases.

  Therefore, if the load applied to the furnace wall during coke extrusion can be calculated in advance based on the profile information of the furnace wall, the operating conditions are changed in advance so that the ram of the extruder does not cause an abnormal load increase. It is also possible to manage the operating conditions so as not to exceed the pressure limit of the furnace wall from the calculated load, and to grasp the necessity of the furnace wall repair.

For such a problem, Patent Document 1 discloses a load waveform at the time of coke extrusion based on the furnace body profile information by calculation using the particle element method, and the load waveform obtained by the above calculation and coke. It has been proposed to analyze the operating conditions of the coke oven by comparing with the load waveforms measured and generated during actual extrusion.
Patent Document 2 discloses a load or pressure applied to the entire furnace wall on at least one side of the carbonization chamber when the produced coke is extruded from the carbonization chamber by an extruder in a horizontal chamber furnace type coke oven, and It has been proposed to estimate the load or pressure applied to the local area of the coking chamber furnace wall by calculation using the discrete element method (particle element method).

  In addition to the calculation method described above, the extrusion load of the coke cake and clogging are measured by measuring the load distribution on the furnace wall when extruding the test coke cake. Analyzing the behavior is also proposed in Patent Document 3.

However, in the calculation using the particle element method proposed in Patent Documents 1 and 2, it is considered that the influence of the furnace body profile and the minute unevenness of the coke on the extrusion load can be considered. There is no clear consideration on how the uneven shape or unevenness scattered on the furnace wall affects the extrusion load, in order to reduce the extrusion load and prevent the occurrence of the above troubles Therefore, it is necessary to further examine the quantitative effect of the unevenness of the furnace wall on the extrusion load.
Further, even in the method of actually measuring the load with the evaluation device proposed in Patent Document 3, the influence of the unevenness of the furnace wall on the extrusion load is not taken into consideration.

JP 2003-277759 A JP 2000-144139 A Japanese Patent Laid-Open No. 10-332501

  Accordingly, the present invention has an object to establish an estimation method of extrusion load from furnace wall profile information in consideration of the influence on the extrusion load of the furnace wall unevenness due to the difference in the shape and location of the furnace wall unevenness of the coke oven. To do.

The gist of the present invention for solving the above problems is as follows.
(1) Set the furnace wall profile in the carbonization chamber of the coke oven, and divide the carbonization chamber into sections with no irregularities and sections with irregularities on the furnace wall in the furnace length direction based on the furnace wall profile. The coke cake in the room is divided into a plurality of element areas, and for each element area, it is determined whether it is in a section with no unevenness or a section with unevenness in the furnace wall, and in each case exists in each element area Each element obtained by obtaining the extrusion force necessary for the coke cake to move at a predetermined speed by adding a reaction force corresponding to the position in the furnace length direction of the element area from the side opposite to the coke extrusion side. A method for estimating a coke extrusion load, characterized by estimating an extrusion load when the entire coke cake is extruded from a carbonization chamber based on an extrusion force in a region.
(2) The method for estimating a coke extrusion load according to (1), wherein a load corresponding to a position in the furnace height direction of the divided section is further added when obtaining the extrusion force.
(3) The method for estimating a coke extrusion load according to (1) or (2), wherein the extrusion force is obtained by a particle element method.
(4) The method for estimating a coke extrusion load according to (1) or (2), wherein the extrusion force is obtained by a test using an evaluation device simulating a carbonization chamber.

  According to the present invention, since the influence of the difference in the size and position of the furnace wall unevenness in the extrusion load is clarified quantitatively, the extrusion load can be estimated more clearly from the profile information of the furnace wall, and the coke The occurrence of troubles during extrusion can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
The extrusion load when extruding the coke cake from the carbonization chamber is estimated by the procedure shown in FIG.
For this purpose, first, a furnace wall profile relating to the position and size of the furnace wall irregularities is set for the carbonization chamber of the coke oven (step 1), and the carbonization chamber is set in the furnace height direction and the furnace length based on the furnace wall profile. In the direction, the furnace wall is divided into a section having no unevenness and a section having unevenness (step 2).
The furnace wall profile is set by a method of actually measuring the furnace wall of the target carbonization chamber by moving a laser distance meter (see, for example, JP-A-2005-249698) or a furnace wall model based on past data. By the way you create.

  Next, as shown in FIG. 2, the coke cake in the carbonization chamber is divided into a plurality of element regions in the furnace length direction and the furnace height direction, and each element region has a section and unevenness on the furnace wall. It is determined which of the sections it is (step 3).

The extrusion force required to extrude the coke cake from the carbonization chamber is mainly determined by the furnace bottom friction force and the furnace wall friction force. Generally, the coke cake goes from the extruder ram side to the guide car side of the carbonization chamber. Accordingly, the side pressure applied to the furnace wall is reduced (see, for example, Japanese Patent Laid-Open No. 8-283730), so that the furnace wall friction force is similarly reduced.
In addition, in the direction of the furnace height of the coke cake, the closer to the furnace bottom, the more the coke self-load is applied, and the furnace bottom frictional force and the furnace wall frictional force increase accordingly.

  Therefore, when obtaining the extrusion force F1 required to move the coke cake existing in each element region at a predetermined speed, the load W corresponding to the position in the furnace height direction is applied to the coke cake existing in the element region in advance. In addition to this, a reaction force F2 is set in accordance with the position of the element region in the furnace length direction and the presence or absence of furnace wall irregularities (step 4).

The extrusion force F1 required to move the coke cake existing in each element region at a predetermined speed is simulated and evaluated as described later for each of the case where the furnace wall has no unevenness and the case where the furnace wall has unevenness. When it is determined by the apparatus, the reaction force F2 is further added in addition to the load W (step 5).
Finally, based on the extrusion load obtained for each element region thus obtained, the overall extrusion load when the coke cake is extruded from the carbonization chamber is estimated (step 6).

In order to obtain the extrusion force required to move the coke cake existing in each divided element region at a predetermined speed, (1) a method for obtaining by simulation using the particle element method, or (2) an evaluation device It is calculated quantitatively by a method obtained by a test using.
Hereinafter, those methods will be described particularly when there are furnace wall irregularities.

First, a method for obtaining by simulation using the particle element method will be described.
In order to obtain the extrusion force using the particle element method, first, one pseudo coke lump is expressed by combining many unit particles so that the outer shape is almost the same as the shape of the actual coke lump. Create a simulated coke cake by combining the lumps. Moreover, the uneven shape of the furnace wall is expressed by a mathematical expression as a boundary condition. When the pseudo coke cake is extruded from the carbonization chamber by the extruder ram, the movement of each pseudo coke mass is simulated by calculation using the particle element method, and the pseudo coke mass acts on the carbonization chamber furnace wall The amount of increase in the extrusion force is analyzed.

FIG. 3 shows a configuration example of a pseudo coke cake used as a model.
First, unit particles 1 constituting the pseudo coke mass are formed into spheres having a diameter of 10 mm, and 56 particles are aggregated to form an aggregate of approximately 30 mm in width and 80 mm in length, thereby producing a pseudo coke mass as shown in FIG. 2 is expressed. Then, the pseudo coke lump 2 is stacked and filled in two rows in the coking oven pseudo carbonization chamber 4 across the central gap 3 in the furnace width direction to form a pseudo coke cake 5 serving as a coke cake model. .

In order to assume a case where some of the furnace wall bricks in the carbonization chamber have been removed (there are recesses) or carbon deposits (there are projections), the furnace wall bricks in the pseudo carbonization chamber have recesses or protrusions. And the corresponding concave portion 6 or convex portion 7 is formed on the pseudo coke cake 5. FIG. 4A shows a plan view when the furnace wall has a concave portion and FIG. 4B shows a plan view when the convex portion has a convex portion.
In this example, the concavo-convex portion of the furnace wall is formed in the entire furnace height direction, and the number of unit particles 1 of the pseudo coke lump 2 located in the concave portion of the furnace wall is increased so that the length in the furnace width direction is increased. Is longer than the length in the furnace width direction of the pseudo coke lump 2 positioned in the smooth portion of the furnace wall. Conversely, in the pseudo coke lump 2 positioned in the convex portion of the furnace wall, the unit particle 1 The number in the furnace width direction is reduced to shorten the length in the furnace width direction.

  The pseudo coke cake 5 thus configured is applied with a predetermined extrusion force F, the pseudo coke cake is extruded at a predetermined speed, and the movement of each pseudo coke mass is simulated by calculation using the particle element method. Calculate

  In the calculation using the particle element method when the furnace wall has irregularities, the shape of the furnace wall is set as a boundary condition in advance, and the concave or convex part of the furnace wall of the carbonization chamber is formed into a pseudo coke cake. Alternatively, estimate the movement of each pseudo coke mass when the convex part passes, and determine whether the unit particles on the outermost surface of the pseudo coke mass touch the furnace wall. The acting force acting on the furnace wall is calculated, and the change in the pushing force is calculated from the acting force.

For example, when there is a recess in the furnace wall brick of the carbonization chamber, the contact between the unit particle 1 having the radius R of the outermost surface of the pseudo coke mass and the furnace wall is determined by the following procedure.
The coke extrusion direction is taken as the X axis, the recess is divided into seven zones as shown in FIG. 5, and the corners of the recess are defined as P1 to P4, and the X coordinate value χ at the boundary of each zone is determined as follows.

(Zone 1) From the origin before the recess to the X coordinate of P1.
(Zone 2) From the X coordinate of the end point of Zone 1 to the X coordinate of the intersection of a straight line separated by R from the straight line passing through P1 and P2 and a circle having a radius R centered on P1.
(Zone 3) From the X coordinate of the end point of Zone 2 to the X coordinate of the center of the circle in contact with both the straight line passing through P1 and P2 and the straight line passing through P2 and P3.
(Zone 4) From the X coordinate of the end point of Zone 3 to the X coordinate of the center of the circle in contact with both the straight line passing through P2 and P3 and the straight line passing through P3 and P4.
(Zone 5) From the X coordinate of the end point of the zone 4 to the X coordinate of the intersection of a straight line separated by R from the straight line passing through P3 and P4 and a circle having a radius R centered on P4.
(Zone 6) From the X coordinate of the end point of Zone 5 to the X coordinate of P4.
(Zone 7) The range from the X coordinate of the end point of zone 6 to the end point exceeding the concavity assumed in the calculation.

Further, as shown in FIG. 5, a line connecting points perpendicular to the furnace wall profile by a radius R of the sphere is used as a contact determination line for determining whether unit particles are in contact with the furnace wall. Set.
Then, with respect to the range of the X coordinate value χ of each zone set as described above, it is sequentially determined which zone of the zone 1 to zone 7 the unit particle of interest is in. It is determined whether the unit particle is in contact with the boundary of the zone constituted by the wall.
Next, when the center of the focused unit particle is on the contact determination line or closer to the furnace wall profile (when the Y coordinate of the unit particle is equal to or greater than the Y coordinate of the contact determination line) Determines that the unit particles and the boundary (furnace wall) are in contact, and otherwise determines that they are not in contact.

Such contact determination between the unit particles and the furnace wall is sequentially performed on the unit particles of the pseudo coke lump in the range corresponding to the furnace wall concave portion, and the acting force on each furnace wall is determined in the case of contact. calculate.
At that time, the pseudo coke cake is moved at a predetermined speed, and the acting force on the furnace wall when one pseudo coke mass passes through the recess is sequentially calculated at a predetermined time pitch to obtain the increase amount of the extrusion force.

  The above procedure is used to change the value 3 of the gap 3 at the center of the pseudo coke cake in the furnace width direction, the value s of the gap between the pseudo coke cake and the furnace wall, and the shape of the concave or convex part of the furnace wall brick. As a result, it is possible to quantitatively estimate the influence of the shape of the unevenness of the furnace wall on the extrusion load under various pseudo coke cake conditions.

  In an actual coke oven, as described above, there is a distribution of pressing pressure in the furnace length direction and a self-load distribution in the furnace height direction in the coke cake, and the extrusion load varies depending on the position of the concave portion (or convex portion). Therefore, a reaction force is applied to the pseudo coke cake, and the difference in self-load is simulated. For example, the position of the recess in the furnace length direction can be changed in a pseudo manner by applying a reaction force from the side opposite to the pseudo coke cake extrusion side. Furthermore, by applying a load from above the pseudo coke cake, the position of the recess in the furnace height direction can be changed in a pseudo manner.

An example of the calculation result calculated by such a method is shown in FIG.
In this example, the pseudo coke cake shown in FIG. 3 is used, and the three types of gaps d3 mm, 4.5 mm, and 9 mm at the center of the pseudo coke cake in the furnace width direction are set, and the inclination angle of the slope is 10 mm deep. Is a change in the extrusion force when the pseudo coke cake is moved at a speed of 2 cm / s with a recess of 18 degrees formed, the interval between the pseudo coke cake and the furnace wall set to 1 mm. .
Note that the load applied by changing the weight of the unit particles was changed according to the assumed position in the furnace height direction. Moreover, the reaction force from the side opposite to the side to which the pushing force is applied was changed according to the assumed position in the furnace length direction.

  In each of FIGS. 6A to 6C, the horizontal axis indicates the time elapsed for extrusion, and the vertical axis indicates the force required to move the pseudo coke mass. A smaller value on the vertical axis indicates a lower extrusion load and better results. As shown in FIG. 6, as the distance d at the center in the furnace width direction becomes narrower (that is, in the order of (a) → (b) → (c)), an increase in the pushing force is recognized at the portion indicated by the arrow.

  As described above, in the simulation using the particle element method, when calculating the acting force on each furnace wall when the unit particles constituting the model are in contact with the furnace wall, pseudo coke cake extrusion is performed. By variously changing the acting force from the opposite side and the upper side of the pseudo coke cake, it is possible to estimate the pushing force according to the uneven position in the furnace length direction and the furnace height direction.

Next, a method obtained by a test using an evaluation apparatus will be described in the case where it is assumed that protrusions (convex parts) exist on the furnace wall surface.
In this example, the extrusion load is obtained using a coke extrusion load evaluation apparatus shown in FIGS.
On the base 11 of the evaluation apparatus, left and right supports 12 and 13 are installed with a certain interval, and a hydraulic cylinder 14 and an air cylinder 16 are also arranged with a certain interval before and after the extrusion direction. ing. Between the supports, a pair of side panels 18 and 19 serving as left and right side walls are arranged, and front and rear panels 20 and 21 are arranged at front and rear ends of each side panel. A pressing space for the coke cake 24 is formed.

The hydraulic cylinder 14 applies an extrusion force to the coke cake 24, and a push-side block 15 for transmitting the extrusion force to the coke cake is attached to the tip of the ram head. The air cylinder 16 applies a reaction force against the pushing force, and a receiving side block 17 for transmitting the reaction force and receiving the pushing force is attached to the tip of the piston rod.
When extruding the coke cake 24 surrounded by each panel by the hydraulic cylinder 14, the assumed position in the furnace length direction of the actually extruded coke cake 24 was changed by changing the magnitude of the reaction force by the air cylinder 16. Under the conditions, it is possible to measure the extrusion force.

  The front and rear panels 20 and 21 move in the coke extrusion direction between the side panels 18 and 19 together with the coke. Therefore, the front and rear panels 20 and 19 are formed to have a width smaller than the interval between the side panels 18 and 19. The direction perpendicular to the direction (width direction) is movable, and a stopper (not shown) is provided on the air cylinder 16 side on the base 11 so as not to move in the coke extrusion direction during coke extrusion. Each panel is suspended and supported vertically by means such as a chain so that it can be moved at the time of coke charging and extrusion, and is installed on the base 11.

  A plurality of load cells 22 are installed between the side panels 18 and 19 and the supports 12 and 13 and between the front and rear panels 20 and 21 facing the push-side and receiving-side blocks 15 and 17, respectively. For example, the extruding force 14, the receiving force received by the air cylinder 16, and the receiving force of the left and right side panels 18 and 19 are detected as total values of a plurality of measured values, respectively.

A protrusion 25 as shown in FIG. 9 can be attached to an arbitrary position on the surface of the side panels 18 and 19 facing the coke using a bolt or the like.
The protrusion 25 has a wedge shape having a slope that is continuous with the top surfaces of the side panels 18 and 19 and a horizontal plane that is parallel to the top face of the panel, and by preparing a plurality of protrusions 25 having different angles and lengths of the slope, The change in the extrusion force due to the difference between the two can be measured.
By using the protrusion 25, the influence on the extrusion load when the wall surface is uneven can be quantitatively measured.

  Since the upper part of the coke cake surrounded by each panel is open, a load can be loaded on the coke to be measured. In an actual coke oven, there is a self-load distribution in the height direction of the coke. Therefore, by loading the load, the assumed position of the protrusion 25 can be changed in the height direction of the furnace where the self-load is different.

  A position detector 26 such as a laser distance meter is attached to a machine frame on the hydraulic cylinder 14 side provided on the base 11, and the moving distance of the push side block 15 during coke extrusion is continuously measured. It can be measured.

  In the coke cake extrusion load evaluation apparatus configured as described above, for example, the coke cake 24 having a predetermined size obtained by dry distillation in a small electric furnace chamber furnace or the like is used for the side wall panels 8, 9 and the front and rear panels 20, A space surrounded by 21 is inserted. The clearance between the charged coke cake 24 and the side panels 18 and 19 is adjusted by the movement of the left and right supports 12 and 13. A protrusion 25 is attached in advance to the side panel 19 on one side of the left and right supports 12 and 13 as shown in FIG.

Thereafter, the hydraulic cylinder 14 is operated to apply an extrusion force to the coke cake 24, and a reaction force is applied by the air cylinder. As a result, the coke cake 24 moves to the air cylinder side by the force of (extrusion force-reaction force). At that time, the coke cake moves from the initial state (I) of FIG. 9A to move the slope of the protrusion (uphill) (II) and finally ride on the protrusion vertex (III).
When the coke passes through the protrusion 25, the load cell measures the force applied to the left and right side panels, the pushing force when pushing, and the receiving force when applying the reaction force.

  Coke when a projection having an inclined surface with an angle of 9.5 degrees and a length of 182.5 mm is installed on the side panels 18 and 19 and a coke cake having an approximate size of 600 mm in the extrusion direction, 400 mm in width and 400 mm in height is extruded. FIG. 9B shows the change in the load detected by the load cell with respect to the movement distance (a plurality of total values on each surface).

  In FIG. 9B, (a) is the total load value (extrusion force) measured by the load cell 22 provided between the push-side block 15 and the front panel 20, and (b) is the receiving side. The total load value (reaction force) measured by the load cell 22 provided between the block 17 and the rear panel 21, (C) is measured by the load cell 22 provided between the support 13 and the right side panel 19. (D) is the total load value (left wall force) measured by the load cell 22 provided between the support 12 and the left side panel 18, respectively. Show.

  When the pushing force is applied to the coke cake 24 by the hydraulic cylinder 14, the air pressure of the air cylinder 16 is controlled so that the reaction force by the air cylinder 16 becomes constant. By changing the set value of the reaction force to be constant (the pushing force also changes depending on the setting value of the reaction force), it is possible to estimate the pushing force at the assumed position in the furnace length direction of the actual coke cake 24. .

  In FIG. 9B, the difference between the extrusion force (A) and the reaction force (B) corresponds to the load acting on the coke cake 24. From FIG. 9 (b), the pushing force (a) increases with the movement of the coke cake 24 in the pushing direction in the range of the moving distance of 120 to 330 mm, and the right wall receiving force (c) and the left wall receiving force (d) are 9C is maximized at a moving distance (300 to 330 mm) corresponding to a position where the coke cake 24 shown in (III) of FIG.

  The above coke extrusion load test is performed by changing the shape of the protrusion, the reaction force of the air cylinder, and the upper load load, and measuring the force on the side wall, the pushing force, and the receiving force in each case, and measuring these. By estimating the extrusion load based on the value and also the load in the furnace height direction, unevenness of various shapes is present in the element area divided into multiple parts in the furnace length direction and furnace height direction of the coke oven. The extrusion load in the element region can be estimated.

In the above description, the case where there is a concave portion on the furnace wall is mainly taken as an example.
Moreover, although the case where the furnace region has unevenness in the element region where the extrusion force is to be estimated has been described as an example, in the case where there is no furnace wall unevenness, either the method by simulation or the method by the evaluation apparatus, By adding a reaction force according to the position, the pushing force in each section can be estimated in the same manner as when there is a furnace wall unevenness.

  As described above, an estimated value of the extrusion force is obtained for each element region divided into a plurality in the furnace length direction and the furnace height direction, and the estimated values are summed in the furnace length direction and the furnace height direction. The extrusion force assumed for the coke cake of the whole furnace can be estimated.

It is a figure which shows the procedure which estimates the extrusion load at the time of extruding a coke cake from a carbonization chamber. It is a figure which shows the element area | region of the furnace length direction at the time of calculating coke extrusion force using a particle element method, and a furnace height direction. It is a figure explaining the structure of the pseudo coke cake used as a model at the time of calculating coke extrusion force using a particle element method. It is a figure explaining the setting conditions of a pseudo coke cake and a furnace wall. It is a figure explaining the method of determining the contact of a unit particle and a furnace wall by the particle element method. It is a figure which shows an example of the result calculated using the particle element method. It is a top view of the evaluation apparatus of coke extrusion load. It is a side view of the evaluation apparatus of coke extrusion load. It is a figure for demonstrating the measuring method of the extrusion force using the evaluation apparatus of coke extrusion load, (a) is a schematic diagram in coke extrusion, (b) is an example of a measurement result. It is a figure which shows typically the state at the time of pushing out coke from the carbonization chamber of a coke oven.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unit particle | grain 2 Pseudo coke lump 3 The gap | interval of the center part of the pseudo coke cake in the furnace width direction 4 The carbonization chamber 5 Pseudo coke cake 6 The concave part of the furnace wall 7 The convex part of the furnace wall 8 The gap between the pseudo coke cake and the furnace wall 11 Base DESCRIPTION OF SYMBOLS 12, 13 Support body 14 Hydraulic cylinder 15 Push side block 16 Air cylinder 17 Receiving side block 18, 19 Side panel 20, 21 Front and rear panel 22 Load cell 23 Roller 24 Coke cake 25 Protrusion 26 Position detector 30 Coke oven 31 Coke cake 32 Extruder ram 33 Furnace wall 34 Furnace wall convex part 35 Furnace wall concave part F Extrusion force d Value of gap at the center of the pseudo coke cake in the width direction s Value of gap between the pseudo coke cake and the furnace wall

Claims (4)

Set the furnace wall profile in the coking oven carbonization chamber,
Based on the profile of the furnace wall, the carbonization chamber is divided in the furnace length direction into a section with no irregularities and a section with irregularities on the furnace wall,
Dividing the coke cake in the carbonization chamber into a plurality of element areas, and determining whether each element area is in a section without unevenness or a section with unevenness in the furnace wall,
In each case, the extrusion force required for the coke cake present in each element region to move at a predetermined speed is determined from the opposite side of the coke extrusion side by the reaction force corresponding to the position of the element region in the furnace length direction. Seeking by adding,
A method for estimating a coke extrusion load, characterized by estimating an extrusion load when the entire coke cake is extruded from a carbonization chamber based on the obtained extrusion force of each element region.   The method for estimating a coke extrusion load according to claim 1, further comprising adding a load according to a position in a furnace height direction of the divided element region when obtaining the extrusion force.   The method for estimating a coke extrusion load according to claim 1 or 2, wherein the extrusion force is obtained by a particle element method.   3. The method for estimating a coke extrusion load according to claim 1 or 2, wherein the extrusion force is obtained by a test using an evaluation device simulating a carbonization chamber.

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