JPS603438B2 - How to measure coke position - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates generally to coke ovens, and more particularly to a method for heating and measuring the actual surface position of coke during extrusion from a coke oven.

To properly operate a by-product coke oven battery, each oven is filled with a predetermined weight of coke oven coal from a rally car, conveyor, or pipeline, and then the top of the coke below the fill hole is filled between the holes. It is necessary to move it to the valley using a leveling rod and level it.

It is intended that the maximum predetermined space of the coke oven be filled at the end of the flattening operation, and that the surface of the fill be relatively smooth over the length of the oven at the start of the coke cycle. After a suitable heating cycle, the ideal charge will reduce downward to a mass of coke with the ideal coke line below and parallel to the fill position line.

The coke is then pushed to the extrusion side of the furnace by the extrusion ram and from the coke side of the furnace to the quenching wheel via the coke guide. Traditionally, coke guide operators visually inspect the coke height during extrusion in the gap between the oven and coke guide or in the slats of the coke guide to indicate incomplete filling of the coke oven. was. However, all current batteries require discharge depletion control during extrusion to eliminate gaps or slats between the oven and coke guide, which prevents visual inspection of coke height during extrusion. In practice, ideal battery operation does not always occur, causing other problems.

This is due to filling errors and/or heating gaps that affect the height or position of the coke during extrusion. For example, errors due to changes in coal density or fouling directly affect the amount, and therefore the location, of coal charged in the pre-coke cycle stage. Conventional mechanical probes with movable parts that are inserted into the fill hole do not always adequately indicate the actual coal position in the furnace, nor do they always record the coal position. Additionally, the uneven gravity distribution of the coal charge results in uneven coke position during extrusion. In addition, gaps in heating and local uneven distribution of fuel due to changes in the total heating amount of fuel,
It affected not only the amount of coke but also the position of the coke during the extrusion operation. In connection with the above, it has long been desired to have a new method or apparatus for automatically measuring the actual surface position of coke in order to indicate that corrective action should be taken to correct the coke position. The primary object of this invention is to provide an improved method of determining the actual surface position of hot coke during extrusion operations from a coke oven.

Another object of the invention is to provide a method for measuring the actual surface position of hot coke during extrusion operations from a coke oven, suitable for use with both closed and open coke guides. Yet another object of the invention is to provide a method for measuring the actual surface position of hot coke without the use of mechanical probes. Yet another object of the invention is to provide a method for determining the position of coke during an extrusion, which allows a record to be made at each extrusion length.

The foregoing objects are achieved by providing an improved method of determining the position of coke during coke extrusion from a furnace. This method measures coke vertical temperature distribution data by measuring a plurality of coke temperatures in a coke guide, and measures the coke vertical temperature distribution data at each of a plurality of synchronized intervals during extrusion of a coke oven. In each set of coke vertical temperature distribution data, detect the highest position where coke is observed, and then . A method of determining the position of coke consists of using the cut or detected position data as an indication of the position of the coke along the length of the oven before extrusion. In the art, there are usually three or four batteries, each with 50 to 60 furnaces. Each furnace is extruded once every 18 to 2 hours. Measuring the actual surface position of the hot coke in a given furnace can therefore help to later adjust the coke filling or flattening of that or other furnaces in the next operating step, if necessary. It is something. Referring to the drawings, and in particular to FIGS. 1 and 2, apparatus for carrying out the method of the present invention is shown in conjunction with a conventional by-product coke oven 10. FIG.

A predetermined weight of coke oven coal is filled in the filling holes 11, 12,
It is put into the coke oven 10 through passages 13 and 14.
Ideally, the coke oven coal should be at a level (not shown).
is used to distribute the coal evenly over the entire area of the coke oven 10 between the coke hearth 15 and the flat smooth theoretical coal line 16. All openings are closed and the heating cycle begins. By the time the heating cycle is complete, the coal charge has been transformed into a mass of coke 17 in the coke oven 10. The door is then removed using a tool (not shown), and the coke 17 is pushed along the entire length of the coke oven 10 by the pushing ram 18 and is forced out via the coke guide 19 into a quenching wheel (not shown). As an example, in the coke guide section 19, five temperature sensors 20 to 24 are provided in a predictable coke height range with respect to the coke hearth 15, and output coke vertical temperature distribution data.

Each temperature sensor 20-24 can use a high speed optical/filometer that generates an analog output signal proportional to coke temperature. This pyrometer provides an output signal that is useful for coke position analysis as well as coke mass and oven wall temperature analysis. The temperature sensors 20 to 24 are
They are located at equal or different heights and located as close as possible to the backstay of the coke oven and within the expected coke height range 25. In the Batte River, where the coke guide 19 is closed for controlled release, it is necessary to modify this to provide a coke position detection closure for each temperature sensor 20 to 24. In the Batte River, where the coke guide is open, the temperature sensors 20 to 24 are aimed at the gap between the coke oven 10 and the coke guide 19 or the gap between the coke guide slats. Instead of a set of optics/gyrometers, other temperature sensors 20 to 24 can be used that generate digital on-output signals above a predetermined value and digital off-output signals below a predetermined value. It is also possible to use fast temperature actuation devices.

Although five temperature sensors 20 to 24 have been described, any number of temperature sensors may be used in practice, depending on the desired accuracy of coke location.

The minimum number of temperature sensors recommended here is three, placed in six skin batteries, each spaced one foot apart. The top temperature sensor is located at the ideal coke line 26. The fourth temperature sensor can be used for either of the following two types. If placed 6 inches above the theoretical coke line 26, it will display overfilled coke ovens 10; if placed below the theoretical coke line 26, it will provide more information about underfilled coke ovens 10. . Another arrangement with five thermometers is to place one temperature sensor in the theoretical coke line 26, one temperature sensor above the coke line 26, and the remaining three below the coke line 26. ing. The position of the temperature sensors should be adjusted so that one or more temperature sensors are not significantly further away from the coke during most of the extrusion into the coke guide 19. In order to perform protecting, two temperature sensors are installed in addition to six skins.
One is 6 inches above the highest point of the expected coke height range 25 and the other is 12 inches below the lowest point of the expected coke height range 25. The position of the former temperature sensor is assumed to be the highest position of the coke 17, and the position of the latter temperature sensor is assumed to be the lowest position of the coke 17. In the smaller 3 batteries, the temperature sensor spacing is correspondingly reduced. The output signals of temperature sensors 20 to 24 represent vertical temperature distribution data of the coke, and these are connected to sensor leads 27 to 3.
1 to a temperature measuring circuit 32.

Here, the optical/gyrometer signal is conditioned, standardized and converted from an analog signal to a digital signal, which is the output of leads 33-37. These digital output signals vary proportionally to the temperature of the coke 17 sensed at various locations in the coke guide 19. "When the other temperature sensor described above is used, the temperature measurement circuit 32 is modified to include conditioning and temperature position sensing, and a digital on-off signal is the output of each lead 33-37. The digital signal is
This indicates whether coke 17 whose temperature is higher than a predetermined temperature exists at the position of each temperature sensor of coke guide section 19. Whether the five vertical temperature profile data signals on leads 33 to 37 are digital proportional signals or digital on-off signals, they are sequentially selected by a conventional multiplexer 38 and stored as a data set in data storage 39. is memorized. multiplexer 38
and data storage 39 process a set of vertical temperature distribution data in each of the plurality of intervals 1 under the control of interval meter 40 . The interval meter 40' is synchronized with the extrusion of the coke oven 10 and starts when the extrusion ram 18 starts and is related to the time of the extrusion ram 18 moving the coke oven 10 under constant speed ram motion. For example, a repeating pulse timer can be used that outputs every four pulse intervals. Also, change the interval meter 40,
It is also possible to generate a length interval, for example 4, which is directly related to the movement of the extrusion ram 18, independent of the ram speed. The first pulse occurs when the extrusion ram 18 begins to move, and the last pulse occurs at the end of the ram extrusion. Whether related to time or length, 4
Zero interval 1 provides a digital proportional or digital on-off coke vertical temperature distribution data set with an optimal five-step position synchronized to the movement of the extrusion ram 18.

In this way, a length reference for the position of the advancing coke is obtained for each data set. The data storage 39 is therefore supplied with a 5.times.40 data matrix which is connected in series to the multiplexer 38 and stores data sets of five positions in synchronization with the interval meter 40. In practice, this is the temperature sensor 2 from the coke oven 15.
A height matrix J equal to the known heights from 0 to 24. Data storage 39 has extra storage capacity to accommodate battery, furnace and fill data 41 supplied externally by the operator.

The battery data includes the factory and battery identification symbol, the oven data includes the ID number of the coke oven 10, the number of flues and dimensional data such as height and length, and, if necessary, the filling data includes the coke oven 10. Includes the amount and characteristics of coke oven coal used. The data stored in data storage 39, namely 5-stage position J data, extrusion ram spacing 1 data, and battery, coke oven and filling data, had an internal CPC and a memory device programmed according to the flowchart of FIG. It interacts with a computer 42 which is a commercially available microcomputer. Computer 42 detects and stores the maximum position of coke 17 in each of the 40 intervals 1 during extrusion. This is done by comparing the temperature measurements of each of the five coke guide locations to a predetermined temperature Tc that identifies whether or not coke is present at each location. Computer 42 prepares, stores, and outputs X, Y axis plots of sensed coke position and spacing data, as well as processing header data representing battery, furnace, and fill data.

The plotter 43 uses the detected coke position data and header data to represent the coke position existing in the length direction of the coke oven 10 before extrusion. The plotter 43 creates coke position charts 44 to 47 shown in FIGS. 4 to 7 that represent the degree of filling of the coke oven. Referring to the drawings, and in particular to FIG. 3, computer 42 scans a 5×40 data matrix representing a coke vertical temperature distribution data set.

Computer 42 initially sequentially scans the stored data representing the known height parameters of the five temperature sensors, J data. Next, the height data of each sensor is scanned at intervals of 1 day from 1 to 40. The next step determines whether coke is at the lowest position sensor 24 by asking whether the stored coke temperature T at interval 1, position 5 is less than Tc. As mentioned above, Tc is the predetermined temperature that identifies whether coke is present. It has been found that if Tc is about 16,500F, there is a magnitude of difference between about 16,500F and the ambient temperature of about 2000F to identify the presence of coke. If the question is yes, ignore the first interval and proceed as follows. If the question is /1,
Indicate that the stored coke temperature T at the lowest position is higher than Tc, and then scan the height J data between sensor positions 1 to 5. The next step is to detect and store the highest location where coke is present in each recorded coke vertical temperature distribution data set.

The determination of the highest position sensor activated by coke is made by determining whether the stored coke temperature T is greater than Tc and repeating this with sensor height J data between sensor positions 1 to 5. The highest sensor position J determined in this way is 1×4 for each of the 40 intervals 1.
0 placed in the output matrix. Another question is asked to determine whether interval 1 is equal to 40.

If no, the steps necessary to determine and store the highest position sensor activated by coke are repeated. The extrusion has ended when the answer to the question is yes, indicating that the number of interval points is equal to 40. Alternatively, when the coke is no longer at the lowest sensor position 24 after the first interval has been ignored as described above, it is assumed that the extrusion has finished. Making such an assumption requires that a minimum temperature sensor, shown as sensor 24, be placed in a position that monitors the coke temperature T at all times during extrusion. Another way to determine when the extrusion cycle has ended is to use the last of the length interval signals of the other interval meter 40 described above to indicate that the extrusion ram operation has been detected from the temperature sensor array 20 of the coke guide 17. This is to indicate that all 24 items have been completed.

At the end of the extrusion cycle, the distance ΔX of each length or time interval 1 of movement of the extrusion ram 18 is calculated by the computer 42 in inches.

This is done by dividing the known internal length of the coke oven 10, obtained from the oven data stored in the data matrix, by the number of points in interval 1 data, denoted as 40, of the coke oven 10. For each interval 1 between 1 and the number of points in the interval 1 data, the computer 42 generates and stores in a plot storage matrix a distance X of the coke oven 10 equal to Δ××1 equal to the coke line matrix which is a function of 1. do.

Similarly, computer 42 generates and stores in a plot storage matrix the height Y of the highest of the five temperature sensors located above coke hearth 15, with 1 representing the coke line. The Y matrix scans the coke line height data of the coke line output matrix described above as a function of This is done by matching the known heights of the temperature sensors 20 to 24 above. Generation and storage of X and Y plot data is
The number of points in interval 1 data shown as 40 is 1
This continues until it is equal to . Plotting of header data consisting of X matrix data versus Y matrix data and battery, furnace and charge data is done by plotter 43 to produce coke position charts 44-47 shown in FIGS. 4-7. In each of these charts, the computer 42 causes the plotter 43 to draw a filled confirmation line indicating that the coke position has been confirmed by one of the five temperature sensors 20-24.
In each of these same charts, the computer 42:
Create and memorize a second or white unconfirmed line indicating that no coke exists above the target coke line. . Let ivy 43 draw it. This uses the same X matrix data and moves the Y matrix data so that each coke line position is moved to the next height sensor position to create a coke confirmation line. Therefore, the actual coke line is located between the confirmed and unconfirmed coke lines in charts 44-47. FIGS. 4 through 7 are examples of confirmed and unconfirmed coke line curves with header data produced by the method of the present invention.

These allow the operator to determine whether or not the coke oven 10 is filled up to the theoretical coke line shown in FIG. 1, and if not, which filling holes 11 to 14 are incompletely filled. It has great value in making decisions. The dip seen at both ends of the curve is typical and is due in part to the damage that occurs to the coke surface when the door is removed from the coke oven 10. Figure 4 shows 21 instead of 40 in interval 1 of the extrusion cycle.
A coke line chart 44 is shown illustrating a relatively well-filled coke oven using a coke oven.

Figure 5 shows that the interval 1 of the extrusion cycle is 40 and <28
A coke line chart 45 showing a typical example of a coke oven with insufficient filling is shown.

There are four flat peaks 48 to 51 corresponding to the four positions of the fill holes 11 to 14, and three valleys 52 to 54 located between these four fill holes. .
In conventional equipment and methods, filling holes 11 to 1 in FIG.
It is worth noting that these three valleys 52-54 could not be seen or measured by 4. Conventionally, the filling height that could be measured was only directly below the filling holes 11 to 14. Naturally, this cannot represent the true filling of the coke oven 10. Figure 6 shows that the filling is performed using fill hole 11 with interval 1 of the extrusion cycle being 40.
, 12 is shown. In this case, the upper temperature sensors are placed close to each other and the sensors 20 and 21 are approximately 6
inches apart. This chart shows that the method of the present invention is capable of identifying small variations in coke lines. FIG. 7 shows a coke line chart 47 for a coke oven 10 with only 24 instead of 40 intervals in the extrusion cycle, and where the position fluctuations due to insufficient filling are more severe than in FIG.

This chart indicates that the coke oven 10 is grossly underfilled and that the operator should take some remedial action. Compensation measures include inspection of filling tiers, flattening methods, weight scales, coal yards and rally car filling counterfeits. The coke line of FIG. 7 further shows that there are four crests below the four fill holes and a significant drop-off at both ends of the coke oven 10.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a computerized coke position detection apparatus for carrying out the method of the present invention, and FIG.
FIG. 3 is a side sectional view of the coke guide showing the position range of the temperature sensor used in the apparatus shown; FIG. 4 to 7 are coke position charts plotted by a terminal connected to the computer of FIG. 1. 10... Coke oven, 11, 12, 13, 14...
...Filling hole, 15...Coke hearth, 1
6... Theoretical coal line, 19... Coke guide section, 20, 21, 22, 23, 24...
... Temperature sensor, 25 ... Coke height range, 26 ... Theoretical coke line. "U/G. / Now / G. 2 Menino G. J Meuno G. 〆ffu/G. Gumewa G. 6 Mew/Gfu

Claims (1)

[Claims] 1. A method for measuring the actual surface position of batch-treated coke in a cycle of pushing hot coke out of a coke oven through a coke guide, comprising: (a)
Vertical temperature distribution of coke by measuring multiple coke temperatures during longitudinal coke extrusion at multiple locations of the coke guide within the expected coke height relative to the coke hearth. (b) storing a plurality of sets of coke vertical temperature distribution data as a data matrix, each measured at a different interval of a plurality of intervals associated with coke oven extrusion; and (c) storing. (d) determining observed coke position data in each interval by detecting the highest position at which a temperature sensor is activated by the coke in each set of coke vertical temperature distribution data; A method for measuring the position of coke, characterized in that the determined coke position data is used as an indication of the position of hot coke existing in a coke oven before an extrusion cycle. 2. A method according to claim 1, wherein in step (a) the temperature of the coke is measured at equal heights of the coke guide. 3. The method of claim 1, wherein in step (a) the temperature of the coke is measured at different heights of the coke guide. 4. In step (a), one of the coke temperatures is measured at a position above the theoretical coke line;
The method according to claim 1, wherein the other coke temperature is measured at a position above or below the theoretical coke line. 5. The method of claim 1, wherein in said storage step (b) said interval is a time interval related to the time of movement of the pusher ram. 6. The method of claim 1, wherein in said storage step (b) said spacing is a length spacing directly related to the movement of the pusher ram. 7. The position detection of step (c) comprises comparing the temperature measurement at each sensor position with a preset temperature to distinguish between the presence and absence of coke. The method described in Section 1. 8. The application step (d) comprises plotting a record of the determined coke position data to indicate the degree of coke oven filling present on the hearth prior to an extrusion cycle in the coke oven. The method according to claim 1. 9. The storing step (b) includes externally storing the header data with battery, furnace or filling data, and the utilizing step (d) includes plotting the header data and storing the header data in the coke oven before the extrusion cycle. 2. A method as claimed in claim 1, including plotting a record of the determined coke position data to indicate the degree of filling of the coke oven present above the bed.