US3767536A - Dust collecting system in a coal charging operation for coke ovens - Google Patents

Dust collecting system in a coal charging operation for coke ovens Download PDF

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Publication number
US3767536A
US3767536A US00195629A US3767536DA US3767536A US 3767536 A US3767536 A US 3767536A US 00195629 A US00195629 A US 00195629A US 3767536D A US3767536D A US 3767536DA US 3767536 A US3767536 A US 3767536A
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United States
Prior art keywords
dust
duct
coal
gas
car
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US00195629A
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English (en)
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M Ikeda
M Sugimoto
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Sumikin Coke Co Ltd
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Sumikin Coke Co Ltd
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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
    • C10B27/00—Arrangements for withdrawal of the distillation gases
    • C10B27/04—Arrangements for withdrawal of the distillation gases during the charging operation of the oven

Definitions

  • ABSTRACT is a dust collecting system for gases containing dust produced in the case of charging coke ovens with coal wherein a plurality of divided subducts are arranged on coke ovens and a main duct connected with them is connected with a dust removing apparatus so that a discharged gas having passed through a dust collecting and removing apparatus for gases containing dust as provided in a coal charging car may be completely introduced into the duct, may have dust well removed with the dust removing apparatus connected with the main duct and may be discharged into the atmosphere as a very clean gas.
  • SHEET 5 CF 5 4 INVENTORS /fE/M U (15 DUST COLLECTING SYSTEM IN A COAL CHARGING OPERATION FOR COKE OVENS This invention relats to a dust collecting system for gases containing a large amount of dust and discharged into the atmosphere through a charging port.
  • the above mentioned two publications relate to a dust collecting and cleaning system wherein a coal dust flowing duct in a coal charging car is made free to connect with a gas and dust collecting pipe fixed on an oven and a dust removing apparatus is connected with the pipe at one end or an atmosphere pollution preventing apparatus wherein a guide car and/or coal charging car is provided with a mechanism for introducing dust gases produced in a coke producing process outside a coke oven so that a dust gas may be introduced to connectrate and collect dust.
  • a guide car and/or coal charging car is provided with a mechanism for introducing dust gases produced in a coke producing process outside a coke oven so that a dust gas may be introduced to connectrate and collect dust.
  • a dust-containing gas produced in the case of charging coke ovens with coal is introduced into a dust arranged on or outside coke ovens and are led to the end part of the duct to remove dust.
  • An object of the present invention is to provide a system for completely introducing such dust-containing gases into a duct provided on a coke oven wherein a plurality of divided sub-ducts are arranged on coke ovens which are connected with a main duct through respective valves and a dust remover is provided in the end part of the main duct so that only the sub-duct into which a dust-containing gas is being introduced may be connected with the main duct but the other sub-ducts may be interrupted fromthe rnain duct by closing the valves, therefore the atmosphere leaking the through the connecting port may be reduced to be a fraction and the dust-containing gas may be introduced into the sub-duct very easily and completely.
  • the dustcontaining gas in which coal gas is present as mixed is burned in advance so as to be converted to an inert gas and at the same time the dust is pre-washed and the gas is cooled so that the gas explsion may be positively prevented and the discharge of the gas and removal of the dust may be easy.
  • Such hot air and coal gas are accompanied with such large amount of coal dust of the coal charge that they will diffuse around as a black or brown jetted smoke through the top of an open rising pipe or the charging port during the charging with the coal to remarkably pollute not only the working environment but also the general environment.
  • the volume of the gas which can be sucked and introduced into the gas collecting main pipe is about 30 to 20 percent of the dust-containing gas produced within the oven chamber and the greater part of the gas is jetted and diffused into the atmosphere through the charging port at the top of the coke oven.
  • the dust content in the collected dust-containing gas is so high as to be 15 to 30 g./Nm that, even if the dust is removed at an efficiency of percent with the dust collector, 2 to 3 g./Nm of the dust will still remain in the exhaust gas after the dust is removed and the exhaust gas after the dust is removed as discharged into the atmosphere out of the dust collector fitted to the coal charging car is still a black or brown exhaust smoke.
  • the dust collector set in the coal charging car is restricted in the capacity and performance by the dimensions or weight in the installation, it is unreasonable to expect a great improvement in the dust removing and collecting efficiency and it is very difficult to completely collect the dust.
  • the dust collecting hood covering the charging port a large volume of the dust-containing gas not yet collected in the dustcollecting apparatus leaks out and is dissipated into the atmosphere.
  • An object of the present invention is to provide a dust collecting system for dust-containing gases jetted out through a coal charging port at the top of a coke oven chamber in a coal charging operation by using a coal charging car in a coke oven so that the danger of the explosion of the gas within the dust collecting apparatus may be positively prevented and the dustcontaining gas may be substantially completely collected and efficiently removed.
  • the dust-containing gas having left the exhauster is led to a sub-duct arranged on the oven through an exhaust duct.
  • a plurality of divided sub-ducts are arranged as sectioned respectively for a battery of about to 30 oven chambers.
  • Each sub-duct is provided with a corresponding suction port for each oven chamber.
  • Each suction port is provided with a value.
  • the sub-duct is connected with the main duct through the valve.
  • a dust collector having a sufficient capacity and dust removing performance and an exhauster are connected with the main duct in the end part.
  • a connector is fitted in the end part of an exhaust duct connected with the outlet of the exhauster provided in the coal charging car so as to be connected with the suction port of the sub-duct corresponding to the oven chamber which is being charged with coal to open the value of the suction port. Therefore, the dust-containing exhaust gas is sucked into the sub-duct from the exhaust duct of the coal charging car, is further led into the dust remover through the main duct, has the dust removed and is discharged into the atmosphere through the exhauster.
  • the dust collecting system of this invention not only the explosion of the gas within the dust collecting apparatus often experienced in the case of collecting dust in the coal charging operation can be positively prevented but also the dust-containing gas can have dust collected and removed substantially completely and far better than with the dust collecting apparatus set in the coal charging car. Further, the exhaust gas can be discharged into the atmosphere as a clean gas in which no tarry substance is recognized at all and therefore the environment pollution problem caused by the dust-containing gas produced in the coal charging operation can be substantially solved.
  • FIG. 1 is a general elevation of a dust collecting system according to the present invention showing a coke oven in section;
  • FIG. 2 is an elevation of a dust collection hood provided in a coal charging car, pre-cleaner, exhauster and arrangement of connecting them showing a sub-duct and main duct in section;
  • FIG. 3 is a plan view of a dust collecting exhaust duct of the coal charging car, sub-duct arranged on the oven and main duct;
  • FIG. 4 is an elevation of a device for connecting the sub-duct with the dust collecting exhaust duct provided in the coal charging car.
  • FIG. 5 is a block diagram of the operation of the value interposed between the sub-duct and main duct.
  • the numeral 1 is a coke oven battery consisting of 106 ovens, each oven chamber being of a length of 5,560 mm. height of 6,000 mm. and width of 450 mm. and about 27 tons of coal being put into each oven through four charging ports 2.
  • a coal charging car 4 is arranged at the oven top 3 so as to be movable on the oven top. Said coal charging car 4 is provided with as many as 4 coal hoppers 5 as the charging ports. In the lower part of the coal hopper 5 are a coal feeder to drop coal into the charging port 2 and a dust collecting hood 6 to cover a coal feeding port 7 and charging port 2.
  • the dust collecting hood 6 is of a size sufficient to cover the charging port 2 and has an igniting device 8 provided with an electric igniter and oil burner to expand a flame within the dust collecting hood.
  • a duct 9 extends from the dust collecting hood 6 so as to be connected with a pre-cleaner 10 which is of a diameter of about 1000 mm. and within which a metal screen 11 of comparatively large meshes rotates so that water may be jetted onto this metal screen through a nozzle 12.
  • the outlet of the pre-cleaner is connected with an exhauster 14 through a duct.
  • This exhauster has a wind volume of 500 m. /min. and can perfectly prevent dustcontaining gases from escaping into the atmosphere through the charging port and dust collecting cover.
  • the exhauster 14 may be also a dust remover.
  • An exhaust duct 15 is connected with the outlet of the exhauster 14 and has a connector 16 at the end.
  • This connector 16 advances or retreats by sliding at the end of the exhaust duct 15 by the operation of a fluid cylinder 17.
  • the connector 16 will retreat to be separated from a suction port 19 of a sub-duct 18 provided to correspond to each oven chamber of the coke oven and having a valve 20.
  • Said sub-duct 18 is arranged along the oven battery on the coke oven and is usually divided into a plurality by being sectioned for 10 to 30 suction ports. This is very important to effectively sucking the dust collecting exhaust of the coal charging car.
  • each of the plurality of the divided sub-ducts is connected with a main duct 23 through a valve 22.
  • the main duct 23 is connected at the end with a dust remover 24 set on the ground.
  • the outlet of the dust remover 24 is opened to the atmosphere through an exhauster 25 which has a wind volume of 1,500 mP/min.
  • the exhauster 25 will be started in advance.
  • the fluid cylinder 17 is operated to advance the connector 16 into contact with the suction port 19, the projecting metal piece 21 will push the valve 20 open so that the exhaust duct and sub-duct 18 may communicate with each other.
  • a pushing plate 36 will push a switch L fitted to the suction port belonging to the subduct 18 to close its electric contact, therefore an electric current will pass through a relay R in FIG. 5, thereby electric contacts R and R -l will close, R -2 andR -3 will open, therefore the electric current will be interrupted in relays R and R and contacts R -0 and R -0 to feed electric currents to electromagnetic valves 31 and 32 will open.
  • an electromagnetic valve 30 will operate to push down the valve body and a fluid cylinder 33 to be fed with a pressure fluid (for example, compressed air) 37 will operate in the direction of opening the valve 22 interposed between the sub-duct l8 and main duct 23 so that the sub-duct 18 and main duct 23 may communicate with each other.
  • a pressure fluid for example, compressed air
  • valve bodies of the electromagnetic valves 31 and 32 When the electric contacts R -0 and R 4) are open, the valve bodies of the electromagnetic valves 31 and 32 will be pushed up by springs and fluid cylinders 34 and 35 to be fed with the pressure fluid 37 will operate in the direction of closing valves 22 and 22", respectively, interposed between sub-ducts l8 and 18" and the main duct 23 so that the communication between the subducts l8 and 18" and main duct 23 may be interrupted.
  • the valve of the suction port will be required to be easy to open and close and very sim ple in the structure. Therefore, in such valve, a clearance will be necessarily produced between the valve body and the pipe wall in making the valve. If there is a clearance of 5 mm.
  • the volume of air flowing into this duct will be 1 m.
  • X 4 sides X 0.005 m
  • X 60 sec. X 100 -I 1,200 m. /min.
  • the volume of air leaking into the sub-duct will be 1 m.
  • X 4 sides 0.005 m.
  • X (20 4) 240 m. /min.
  • the coal feeder of the coal hopper in the coal charging car will be operated so that coal may be put into the oven chamber through the four charging ports 2 at the top of the coke oven chamber.
  • the dust-containing gas jetted out through the charging ports will be caught by the dust collecting hood 6, will be burned by the flame of the burner 8 so that the tarry substance and other combustible compositions may be substantially burned, will be led to the prewleaner 10 through the duct 9 and will be cooled therein with water jetted out through the nozzle 12.
  • Coarser particles of dust will be caught by the mesh screen 11.
  • the dust will be shaken around by the rotation of the mesh screen, will collect together with washing water in the lower part of the casing and will accumulate in a dirty water tank 28.
  • the water containing dust in the dirty water tank will be discharged with a separate automatic device while the coal hopper in the coal charging car is being loaded with coal when the coal charging operation is finished and, at the same time, a water tank 27 will be fed with fresh water. In the pre-cleaner, about percent of the dust accompanying the gas will be removed.
  • Table 1 is of the results of measuring the dust removing exhaust gas of the coal charging car equipped with the pre-cleaner wherein the volume of sucked wind was then 250 mP/min. but was improved later to be 500 m. /min.
  • the exhaust gas having left the exhaust duct 15 will enter the sub-duct 18 as it is, will be led into the main duct 23 through the valve 22, will have dust removed in the wet-type dust remover 24, will become a clean gas and will be discharged into the atmosphere through the exhauster 25.
  • Table 2 is of the results of measuring the dust removing exhaust gas of the dust remover 24 wherein, as the dust content is less than 0.1 g./Nm. and the tarry substance in the gas has been already burnt out, the dust removing exhaust gas is so clean as to have substantially no influence on the pollution of the atmosphere.
  • a coke oven system comprising a battery of coke ovens arranged in a longitudinal direction, each oven having at least one coal charging port, and a coke charging car adapted to travel along a path in said longitudinal direction to a plurality of stations above said battery and to selectively stop at any one of said stations and deliver coal to one of said ovens, said car including hopper means and at least one coal feeding duct for feeding coal from said hopper means to any TABLE 2.DUST CONTENTS Volume of ex- At the inlet At the outlet Volume of ex- At the outlet hausted wind of of the dust of the prehausted wind of of of the dust the exhauster of General collector cleaner in the coal charging remover in the dust remover efficiency in glm. g./Nm.
  • the present invention is very useful to the improvement of the invironment and the prevention of the pollution of the atmosphere.
  • stationary duct means communicating with said stationary dust-removal and suction means and extending along the path of said car, said duct means including a plurality ofinlet ports, each arranged to join said exhaust port when said car is located at one of said stations, and
  • valve means at each of said inlet ports arranged to be automatically opened by the presence of said car at the corresponding station
  • said stationary duct means comprises a plurality of sub-ducts arranged end to end along the path of said car and each including at least two of said plurality of inlet ports, a main duct leading to said stationary dust-removal means, a plurality of connecting ducts each joining a sub-duct to said main duct, a valve in each of said connecting ducts and control means actuated by the presence of the car at a predetermined station for positively opening the valve in the connecting duct leading to the sub-duct containing the inlet port associated with said predetermined station and for positively closing the valve in the other connecting ducts whereby leakage through the plurality of closed valve means at said inlet ports is minimized.
  • control means comprises an electrical switch at each of said stations, relay means, a plurality of solenoid operated valves equal to the number of valves in said connecting ducts, a piston-cylinder device for operating each of said connecting duct valves, and a pressurized fluid system controlled by said solenoid activated valves for opening and closing said connecting duct valves.
  • said initial gas filter means on said car comprises a rotatably mounted screen through which said dust laden air is collected, water storage means, means for spraying water from said storage means on said screen, and means for storneously opening the valve means at the one inlet port.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
US00195629A 1970-11-04 1971-11-04 Dust collecting system in a coal charging operation for coke ovens Expired - Lifetime US3767536A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086144A (en) * 1974-11-16 1978-04-25 Bergwerksverband Gmbh Process and apparatus for the separation of float tars in the tar separator of a coking installation
US4100033A (en) * 1974-08-21 1978-07-11 Hoelter H Extraction of charge gases from coke ovens
US4106998A (en) * 1973-10-25 1978-08-15 Nippon Kokan Kabushiki Kaisha Method of restraining emission from coke quenching equipment
US4137128A (en) * 1976-03-19 1979-01-30 Dr. C. Otto & Comp. G.M.B.H. Battery of horizontal coke ovens and method for operating the same
US4146435A (en) * 1974-12-28 1979-03-27 Mitsubishi Chemical Industries, Ltd. Dust collecting system for coke oven
US4157940A (en) * 1976-03-19 1979-06-12 Dr. C. Otto & Comp. G.M.B.H. Method for operating a battery of horizontal coke ovens
US4212706A (en) * 1977-07-08 1980-07-15 Nippon Kokan Kabushiki Kaisha Method of controlling pressure of gas circulating in the coke dry quenching apparatus
US4238292A (en) * 1978-08-14 1980-12-09 Wsw Stahl- Und Wasserbau Gmbh Apparatus for withdrawing and cleaning emissions of a battery of coke ovens
US4334963A (en) * 1979-09-26 1982-06-15 Wsw Planungs-Gmbh Exhaust hood for unloading assembly of coke-oven battery
US4360403A (en) * 1975-11-17 1982-11-23 Silka Adolf N Method of charging coke ovens with coal
DE3213169A1 (de) * 1982-04-08 1983-10-20 Gewerkschaft Schalker Eisenhütte, 4650 Gelsenkirchen Verkokungsofen
US4909160A (en) * 1988-10-24 1990-03-20 Eta Engineering, Inc. Temperature-controlled exhaust particulate collection system for high temperature material processing facility
EP0844296A3 (de) * 1996-11-22 1998-12-09 Krupp Uhde GmbH Füllgas-Abführeinrichtung für einen Verkokungsofen
CN102634353A (zh) * 2012-04-13 2012-08-15 大连华锐重工焦炉车辆设备有限公司 焦炉机侧除尘系统
US8257477B1 (en) 2009-09-08 2012-09-04 Hart Scott A Dust control system
CN103396812A (zh) * 2013-08-02 2013-11-20 莱芜钢铁集团有限公司 一种装煤车烟气快速切断装置及其工作方法
CN113514170A (zh) * 2021-05-12 2021-10-19 中国矿业大学 一种多工位测试集烟罩系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1376313A (en) * 1918-12-02 1921-04-26 Koppers Co Inc Coke-oven-charging car
US1376314A (en) * 1921-04-26 Vania
US3435596A (en) * 1967-06-29 1969-04-01 Koppers Co Inc Gas cleaning apparatus for coke oven batteries
US3537957A (en) * 1967-09-07 1970-11-03 Koppers Co Inc Apparatus for the ignition of charging gases produced during the charging of coke ovens
US3647053A (en) * 1969-11-20 1972-03-07 United States Steel Corp Apparatus for and method of collecting smoke from coke ovens during charging

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1376314A (en) * 1921-04-26 Vania
US1376313A (en) * 1918-12-02 1921-04-26 Koppers Co Inc Coke-oven-charging car
US3435596A (en) * 1967-06-29 1969-04-01 Koppers Co Inc Gas cleaning apparatus for coke oven batteries
US3537957A (en) * 1967-09-07 1970-11-03 Koppers Co Inc Apparatus for the ignition of charging gases produced during the charging of coke ovens
US3647053A (en) * 1969-11-20 1972-03-07 United States Steel Corp Apparatus for and method of collecting smoke from coke ovens during charging

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106998A (en) * 1973-10-25 1978-08-15 Nippon Kokan Kabushiki Kaisha Method of restraining emission from coke quenching equipment
US4100033A (en) * 1974-08-21 1978-07-11 Hoelter H Extraction of charge gases from coke ovens
US4086144A (en) * 1974-11-16 1978-04-25 Bergwerksverband Gmbh Process and apparatus for the separation of float tars in the tar separator of a coking installation
US4146435A (en) * 1974-12-28 1979-03-27 Mitsubishi Chemical Industries, Ltd. Dust collecting system for coke oven
US4360403A (en) * 1975-11-17 1982-11-23 Silka Adolf N Method of charging coke ovens with coal
US4137128A (en) * 1976-03-19 1979-01-30 Dr. C. Otto & Comp. G.M.B.H. Battery of horizontal coke ovens and method for operating the same
US4157940A (en) * 1976-03-19 1979-06-12 Dr. C. Otto & Comp. G.M.B.H. Method for operating a battery of horizontal coke ovens
US4212706A (en) * 1977-07-08 1980-07-15 Nippon Kokan Kabushiki Kaisha Method of controlling pressure of gas circulating in the coke dry quenching apparatus
US4238292A (en) * 1978-08-14 1980-12-09 Wsw Stahl- Und Wasserbau Gmbh Apparatus for withdrawing and cleaning emissions of a battery of coke ovens
US4334963A (en) * 1979-09-26 1982-06-15 Wsw Planungs-Gmbh Exhaust hood for unloading assembly of coke-oven battery
DE3213169A1 (de) * 1982-04-08 1983-10-20 Gewerkschaft Schalker Eisenhütte, 4650 Gelsenkirchen Verkokungsofen
US4909160A (en) * 1988-10-24 1990-03-20 Eta Engineering, Inc. Temperature-controlled exhaust particulate collection system for high temperature material processing facility
EP0844296A3 (de) * 1996-11-22 1998-12-09 Krupp Uhde GmbH Füllgas-Abführeinrichtung für einen Verkokungsofen
US8257477B1 (en) 2009-09-08 2012-09-04 Hart Scott A Dust control system
CN102634353A (zh) * 2012-04-13 2012-08-15 大连华锐重工焦炉车辆设备有限公司 焦炉机侧除尘系统
CN103396812A (zh) * 2013-08-02 2013-11-20 莱芜钢铁集团有限公司 一种装煤车烟气快速切断装置及其工作方法
CN113514170A (zh) * 2021-05-12 2021-10-19 中国矿业大学 一种多工位测试集烟罩系统

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