EP0077409A1 - Procédé pour déterminer le niveau de coke - Google Patents

Procédé pour déterminer le niveau de coke Download PDF

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Publication number
EP0077409A1
EP0077409A1 EP81108452A EP81108452A EP0077409A1 EP 0077409 A1 EP0077409 A1 EP 0077409A1 EP 81108452 A EP81108452 A EP 81108452A EP 81108452 A EP81108452 A EP 81108452A EP 0077409 A1 EP0077409 A1 EP 0077409A1
Authority
EP
European Patent Office
Prior art keywords
coke
level
oven
data
intervals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81108452A
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German (de)
English (en)
Other versions
EP0077409B1 (fr
Inventor
John H. Gerdes, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bethlehem Steel Corp
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Bethlehem Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bethlehem Steel Corp filed Critical Bethlehem Steel Corp
Priority to DE8181108452T priority Critical patent/DE3173395D1/de
Priority to AT81108452T priority patent/ATE17255T1/de
Priority to EP81108452A priority patent/EP0077409B1/fr
Publication of EP0077409A1 publication Critical patent/EP0077409A1/fr
Application granted granted Critical
Publication of EP0077409B1 publication Critical patent/EP0077409B1/fr
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B33/00—Discharging devices; Coke guides
    • C10B33/14—Coke guides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B31/00—Charging devices

Definitions

  • This invention relates broadly to coke ovens, and more particularly to a method of determining coke level during pushing operation.
  • each oven must be charged from a larry car, conveyor or pipeline with a predetermined weight amount of coking coal, then leveled by a leveler bar to move peaks of coal below charging holes to valleys therebetween. It is intended that when leveling is completed the charge will fill the maximum predetermined space in the coke oven and that the top of the charge will have a relatively smooth line lengthwise throughout the oven at the start of the coking cycle.
  • a main object of this invention is to provide an improved method of determining coke level during pushing operations.
  • Another object of this invention is to provide a method of determining coke level during pushing operation that will be suitable for use with both enclosed and unenclosed coke guides.
  • Still another object of this invention is to provide a method of determining coke level without using mechanical probes.
  • Yet another object of this invention is to provide a method of determining coke level during pushing which will provide a documented record thereof every push.
  • the foregoing objects may be achieved by providing an improved method of determining coke level during pushing from a coke oven which comprises measuring coke vertical temperature profile data by sensing plural coke temperatures at a coke guide; storing one coke vertical temperature profile data set at each of plural intervals synchronized with the coke oven push; detecting the highest level at which coke was observed in each stored vertical temperature profile data set; and plotting, or otherwise utilizing, the detected level data to represent coke level existent lengthwise along the coke oven before pushing.
  • FIGS. 1 and 2 apparatus for carrying out the method of this invention is shown in the environment of a conventional by-product coke oven 10.
  • a predetermined weight amount of coking coal is introduced through charging holes 11, 12, 13, 14 to the interior of coke oven 10.
  • coking coal is distributed evenly throughout coke oven 10 by a leveler bar (not shown) between coke oven floor 15 and a smooth, fairly even, theoretical coal line 16. All openings are closed and the heating cycle is started. By the time the heating cycle is completed, the coal charge is converted to a mass of coke 17 inside coke oven 10. Doors are then removed by machines not shown and pusher ram 18 pushes coke 17 throughout the length of coke oven 10, through coke guide 19, and into a quench car also not shown.
  • coke guide 19 is provided with five temperature sensors 20 to 24 mounted in an expected coke height range 25, referenced to coke oven floor 15, to develop coke vertical temperature profile data.
  • Each temperature sensor 20 to 24 may be a fast-acting optical pyrometer having an analog output signal proportional to coke temperature.
  • a pyrometer has the advantage of providing an output signal that is useful not only for coke level analysis, but coke mass and oven wall temperature analysis as well.
  • Temperature sensors 20 to 24 are mounted at levels in expected coke height range 25, either at equal or unequal heights, and as close to buckstays in coke oven 10 as is possible. In batteries where coke guide 19 is enclosed for emission control purposes, a modification must be made therein to provide a coke-level sight opening for each temperature sensor 20 to 24. In batteries where coke guide 19 is unenclosed, temperature sensors 20 to 24 are aimed through a gap between coke oven 10 and coke guide 19, or between the gap in coke guide slats.
  • temperature sensors 20 to 24 may be of other fast-acting thermal responsive devices which produce a digital on type output signal above a preset value and an off signal below the preset value.
  • temperature sensors 20 to 24 actually any number of temperature sensors may be configured, depending upon the accuracy of coke level determination desired.
  • a minimum number of temperature sensors recommended is three, each spaced about a foot (about 30 cm) apart on a six-meter battery. The uppermost temperature sensor is located at theoretical coke line 26.
  • a fourth temperature sensor could be used in either of two ways. By placing it about 6 inches (about 15 cm) above theoretical coke line 26, it will provide an indication of coke oven 10 overfilling.By placing it below theoretical coke line 26, more accurate information is obtainable regarding coke oven 10 under- filling.
  • Another five-temperature sensor setup is to arrange them such that one temperature sensor is mounted at theoretical coke line 26, one temperature sensor above coke line 26, and the remaining three below coke line 26.
  • the temperature sensor locations should be adjusted so that no more than one temperature sensor is out of coke sight for the majority of the push through coke guide 19.
  • two additional temperature sensor locations are assumed in a six-meter battery, one about 6 inches (about 15 cm) above the uppermost level of expected coke height range 25, the other about 12 inches (about 30 cm) below the lowermost level of expected coke height range 25.
  • the first temperature sensor location is assumed to be the highest level coke 17 could possibly be.
  • the second temperature sensor location is assumed to be the lowest level coke 17 could possibly be.
  • the distance between temperature sensors should be reduced accordingly.
  • Output signals from temperature sensors 20 to 24 represent coke vertical temperature profile data and are fed over sensor leads 27 to 31 to temperature measuring circuits 32.
  • the optical pyrometer signals are conditioned, standardized and converted from analog to digital signals which are output on leads 33 to 37. These digital output signals vary proportional to the coke 17 temperature sensed at the various levels in coke guide 19.
  • temperature measuring circuits 32 are modified to include conditioning and temperature level detectors so that digital on-off signals will be output on each lead 33 to 37. This form of digital signal represents the presence or absence of hot coke 17 exceeding a preset temperature at the respective temperature sensor level in coke guide 19.
  • Intervalometer 40 is synchronized with coke oven 10 push and may be a repeat pulse timer started when pusher ram 18 is started and output a pulse at each of say forty time intervals I related to the duration of pusher ram 18 movement through coke oven 10, assuming constant ram velocity.
  • intervalometer 40 may be modified to produce say forty length interval I pulses referenced directly to pusher ram 18 movement independent of ram velocity. The first pulse is produced when pusher ram 18 movement starts, the last pulse when the ram stops at the end of the push.
  • intervals I provide a convenient number of five-level, digital proportional or digital on-off, coke vertical temperature profile data sets to be keyed to pusher ram 18 movement. In this manner a length reference is obtained for the location of advancing coke cake for each data set. For this reason, data storage 39 is provided with a 5 x 40 data matrix connected sequentially to multiplexer 38 for storing five-level data sets in synchronism with intervalometer 40. In practice, this is a height matrix J equal to the known height-of temperature sensors 20-24 above coke oven floor 15.
  • Data storage 39 has additional storage capacity to accommodate battery, oven and charge data 41 fed externally from an operator.
  • Battery data includes plant and battery identification;
  • oven data includes coke oven 10 I.D. number, number of flues and dimension, data, such as height and length; and, if desired, charge data may include the amount and characterization of coking coal charged to coke oven 10.
  • the data stored in data storage 39 namely, five-level J data, pusher ram interval I data and battery, coke oven and charge data, interacts with computer 42, a commercial microcomputer having internal CPU and storage devices programmed according to FIG. 3 flow chart.
  • Computer 42 detects and stores the highest level where coke 17 was present at each of the forty intervals I throughout the pushing cycle. This is done by comparing the temperature measurement at each of the five coke guide levels to a preset temperature T c which differentiates between the presence and absence of coke 17 at that level.
  • Computer 42 prepares, stores and outputs X and Y axis plots of detected coke level and interval data, as well as header data representing battery, oven and charge data.
  • Plotter 43 utilizes the detected coke level data, and header data, to represent coke level existent lengthwise of coke oven 10 before pushing.
  • Plotter 43 produces coke level charts 44 to 47 shown in FIGS. 4-7 which indicate the degree of coke oven filling.
  • computer 42 scans the 5 x 40 data matrix which represents coke vertical temperature profile data sets.
  • Computer 42 first scans stored data sequentially which represents five temperature sensor known height parameter J data, then scans each sensor height data between 1 to 40 intervals I data.
  • the next step is to determine if coke was at the bottom level sensor 24 by querying if the stored coke temperature T at interval I, level 5, is less than T c .
  • T is a preset temperature which differentiates between the presence and absence of coke. It has been found that if T c is about 900°C, then nearly an order of magnitude of difference occurs between coke at 900°C and ambient air at ⁇ 93°C to satisfy the coke differentiating requirement. If the query was yes, disregard the Ith interval and proceed as described below. If the query was no, indicating the bottom level stored coke temperature T was above T c , then proceed to scan height J data between sensor levels 1 to 5.
  • the next step is detecting and storing the highest level at which coke was observed in each stored coke vertical temperature profile data set.
  • a determination is made of the highest level sensor activated by coke by determining if stored coke temperature T was greater than T c and repeating such determination through sensor height J data between sensor levels 1 to 5.
  • the highest sensor level J thus determined is placed in a 1 x 40 output matrix for each of the forty intervals I.
  • Another query is made to determine if interval I is equal to forty. If no, the necessary steps of determining and storing the highest level sensor activated by coke are repeated. When the query answer is yes, indicating that the number of interval points is equal to forty, the push is over. Or, the push is assumed to be over when coke is no longer present at the lowest sensor level 24 after the Ith interval has been disregarded as described above. The later assumption necessitates placing the lowest temperature sensor, exemplified as sensor 24, in such a position that it will always be monitoring coke temperature T during the pushing cycle. ,
  • Another method of determining when the pushing cycle is completed is to utilize the last of the above-mentioned alternative intervalometer 40 length interval signals to indicate pusher ram movement is completed up to the array of temperature sensors 20-24 in coke guide 17.
  • an actual value of AX distance in feet between each time or length interval I of pusher ram 18 movement is calculated in computer 42. This is done by dividing the number of points of interval I data in coke oven 10, exemplified as forty, by the known internal length of coke oven 10 obtained from oven data stored in the data matrix noted above. For each interval I between one and the number of points of interval I data, computer 42 generates and stores in a plot storage matrix, X the distance across coke oven 10 is equal to coke line matrix as function of I, which is equal to AX x I. Likewise, computer 42 generates and stores in the plot storage matrix, Y the height above the coke oven floor 15 of the highest of five temperature sensors representing the coke line at I.
  • the Y matrix is done by scanning the coke line height data in coke line output matrix noted above as a function of I and equating this to the known height of coke oven 10 and known height of temperature sensors 20-24 above coke oven floor 15 obtained from oven data stored in the data matrix noted above.
  • the generating and storing of X and Y plot data is continued until I is equal to the number of points of interval I data which is forty as exemplified herein.
  • plotter 43 issuing coke level charts 44-47 shown in FIGS. 4-7.
  • computer 42 causes plotter 43 to plot a solid-dot observed coke line where coke level was observed by one of the five temperature sensors 20-24.
  • computer 42 generates, stores and causes plotter 43 to plot a second or an open-dot unobserved coke line where no coke was observed above the observed coke line.
  • FIGS. 4 - 7 are examples of observed and unobserved coke line curves with header data generated by the method of this invention. They are of great value to an operator in determining whether or not coke oven 10 was filled to theoretical coal line 16 shown in FIG. 1, and if not, at what charging hole or holes 11 - 14 where improper filling occurred. A minor fall-off at both ends of the curves is typical, due in part to a breakdown in coke cake face when the doors are removed from coke oven 10.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
  • Carbon And Carbon Compounds (AREA)
EP81108452A 1981-10-17 1981-10-17 Procédé pour déterminer le niveau de coke Expired EP0077409B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8181108452T DE3173395D1 (en) 1981-10-17 1981-10-17 Method of determining coke level
AT81108452T ATE17255T1 (de) 1981-10-17 1981-10-17 Verfahren zur bestimmung der kokshoehe.
EP81108452A EP0077409B1 (fr) 1981-10-17 1981-10-17 Procédé pour déterminer le niveau de coke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81108452A EP0077409B1 (fr) 1981-10-17 1981-10-17 Procédé pour déterminer le niveau de coke

Publications (2)

Publication Number Publication Date
EP0077409A1 true EP0077409A1 (fr) 1983-04-27
EP0077409B1 EP0077409B1 (fr) 1986-01-02

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EP81108452A Expired EP0077409B1 (fr) 1981-10-17 1981-10-17 Procédé pour déterminer le niveau de coke

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EP (1) EP0077409B1 (fr)
AT (1) ATE17255T1 (fr)
DE (1) DE3173395D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130170A3 (en) * 1983-06-23 1985-05-15 Centre De Recherches Metallurgiques Centrum Voor Research In De Metallurgie Association Sans But Lucratif Process for regulating the charging of a coke oven chamber
EP0864632A1 (fr) * 1997-03-10 1998-09-16 Cockerill Sambre Dispositif de mesure de la hauteur de coke dans une cellule de carbonisation
WO2006087158A3 (fr) * 2005-02-16 2006-11-30 Schalker Eisenhuette Maschf Procede et systeme pour commander et/ou reguler sur la base de l'experience un processus de fonctionnement d'un dispositif de commande d'un four a coke

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007163C5 (de) * 2005-02-16 2009-12-10 Schalker Eisenhütte Maschinenfabrik Gmbh Verkokungsverfahren zur Herstellung von Koks und Koksofenbedienungseinrichtung
DE102006008150B4 (de) * 2006-02-20 2016-10-06 Kbs Kokereibetriebsgesellschaft Schwelgern Gmbh Koksführungswagen mit einer Wanne und Koksofen mit einem Koksführungswagen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB694336A (en) * 1950-01-21 1953-07-15 Gaz De France Improvements in or relating to gas producers or shaft furnaces having means for indicating and/or controlling the level of the charge
DE1226074B (de) * 1961-06-03 1966-10-06 Still Fa Carl Vorrichtung zur Temperaturmessung des Kokskuchens waehrend des Ausdrueckens aus einem Horizontalkokskammerofen
GB2073408A (en) * 1980-04-02 1981-10-14 British Steel Corp Temperature monitoring device and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB694336A (en) * 1950-01-21 1953-07-15 Gaz De France Improvements in or relating to gas producers or shaft furnaces having means for indicating and/or controlling the level of the charge
DE1226074B (de) * 1961-06-03 1966-10-06 Still Fa Carl Vorrichtung zur Temperaturmessung des Kokskuchens waehrend des Ausdrueckens aus einem Horizontalkokskammerofen
GB2073408A (en) * 1980-04-02 1981-10-14 British Steel Corp Temperature monitoring device and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130170A3 (en) * 1983-06-23 1985-05-15 Centre De Recherches Metallurgiques Centrum Voor Research In De Metallurgie Association Sans But Lucratif Process for regulating the charging of a coke oven chamber
EP0864632A1 (fr) * 1997-03-10 1998-09-16 Cockerill Sambre Dispositif de mesure de la hauteur de coke dans une cellule de carbonisation
BE1011036A3 (fr) * 1997-03-10 1999-04-06 Cockerill Sambre Sa Dispositif de mesure de la hauteur de coke dans une cellule de carbonisation.
WO2006087158A3 (fr) * 2005-02-16 2006-11-30 Schalker Eisenhuette Maschf Procede et systeme pour commander et/ou reguler sur la base de l'experience un processus de fonctionnement d'un dispositif de commande d'un four a coke

Also Published As

Publication number Publication date
ATE17255T1 (de) 1986-01-15
EP0077409B1 (fr) 1986-01-02
DE3173395D1 (en) 1986-02-13

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