The coke generated after heating has a high heating calorific value and is used for burning purposes in blast furnace. What is the difference between recovery and nonrecovery. Economics and alternatives for sulfur removal from coke oven gas michael j. Alfa laval has a long history of helping coke producers meet their challenges with our solutions for heat transfer and separation.
Coke oven article about coke oven by the free dictionary. Coke production chemical agents and related occupations. In germany, a group of 29 cokeoven workers and a control group were studied. The waste mill oil was added in the coal blend as a binder before hammer mill and charged in.
Coke plant technologies pioneering coke plant technologies are part of our daily business. Comparison of byproduct and heatrecovery cokemaking. Us5968320a nonrecovery coke oven gas combustion system. Application of sketchup in coke oven threedimensional digital modeling. Taller ovens allow greater amounts of coke to be produced per oven, therefore minimizing the number of charges and pushes and related emissions to make the needed tonnage. To reduce costs, improve yields and treat gas in an environmentally responsible. Before carbonization, the selected coals from specific mines are blended, pulverized, and oiled for proper bulk density control. A highquality coal does not generate high pressure on the coke oven, and they also shrink enough so that they are easily removed from the coke oven. An introductory presentation on coke oven plant free download as powerpoint presentation. The system has the usual battery of coke ovens and corresponding ascension pipes connected to a collector main. Chronic longterm exposure to coke oven emissions in humans results in conjunctivitis, severe dermatitis, and lesions of the respiratory system and digestive system.
Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of aira destructive distillation process. The coke oven byproduct plant coopers creek chemical. The osha standard for coke oven emissions, which went into effect in january 1977, sets a permissible exposure limit to coke oven emissions of 150 microgramsm3 benzenesoluble fraction of total particulate matter bsftpm. An introductory presentation on coke oven plant coke. A cross section, showing the alternating arrangement of flue walls and ovens. The raw coke oven gas and the flushing liquor are separated using a drain pot the down comer in the suction main. The formulation of coke oven blends is also considered, along with the production factors that affect the quality of coke.
Coke and coke byproducts, including coke oven gas, are. Coke properties high quality coke is characterized by a definite set of physical and chemical properties that can. Coke is the most important raw material fed into the blast. The main byproduct in the process of coke making is crude coke oven gas and this has a lot of valuable chemicals. Physicochemical treatment of coke plant effluents for. Waste characteristics the coke oven is a major source of fugitive air emissions. Coke oven gas is the byproduct of the pyrolysis of coal, which is the basic process for coke production for the blast furnace process.
Top tar precipitators as the raw coke oven gas is cooled, tar vaporcondenses and forms aerosols which are carried along with the gas flow. The first coke ovens stall ovens were used in the early 19th century. Coal carbonization and coke oven plant nptel due to increasing demand of iron and steel, there has been a considerable increase in the coke oven capacity which resulted increase output of coal chemicals. Monckton coke works formerly the monckton coke and chemical company ltd was a coking plant near royston in south yorkshire, england. Industry profile draft report prepared for daniel c. Coke production for blast furnace ironmaking by hardarshan s.
The entire cokemaking operation is comprised of the following steps. Air pollution problems of the steel industry informative report section iismoke in coke oven operation coke for smelting of iron ore in the blast furnace must meet particular specifications as to its physical qualities and composition and is especially produced in the coke oven plant from carefully selected types of bituminous coal. Hence, this process is called byproduct cokemaking. Generalised crosssection of a beehive coke oven with a charge of coal roger 1998 figure 3. Saturated raw gas coming from the coke oven battery contains around 46 % to 48 % water vapour. College of chemical engineering and technology, wuhan university of science and technology1. It is worldwide one of the biggest coke plants recently build. A system for transporting and burning under negative pressure in a boiler a raw coke oven gas to produce steam energy. The composition may also include benzene c 6 h 6, ammonia nh 3, hydrogen sulfide h 2 s and other components design. By product plant operation outlook future aspects of coke making coking plant tour at kbs schwelgern, duisburg. Coke makers use a mix of coal to improve the quality of coke they create. The effi ciency and environmental performance of our plants are renowned worldwide.
Design, engineering, supply, building and commissioning of pollution free coke oven batteries cobs of 4. The coal gas generated on heating the cake in oven is collected by a vertical hooper and sent to by product plant for its use. Coke oven byproduct plant interface in a byproduct coke oven the evolved coke oven gas leaves the coke oven chambers at high temperatures approaching 2000f. Up to 96 ovens, 400,000ta for single row sidecharging and stamping cokeoven. The coke plant was integrated into a new steel plant complex to serve the needs of the blast furnaces and other consumers figure1. Application of sketchup in coke oven threedimensional. The blended coal is charged into a number of slot type ovens wherein each oven shares a common heating flue with the. A transport main delivers the cooled raw coke oven gases and. The clean coke oven coal gas is used as fuel for the coke ovens, other plant combustion processes, or sold. During the coke quenching, handling, and screening operation, coke breeze is produced. The pusher machine has a pusher arm that puts the coke into a car that takes the coke to a coke quenching tower. Each battery consists of at least 80 100 coke ovens.
The integration of schalkes coke oven machine technology makes. Valia, scientist, ispat inland inc introduction a world class blast furnace operation demands the highest quality of raw materials, operation, and operators. The flushing liquor and the raw coke oven gas then flow separately to the byproduct plant for treatment. Pdf coke ovens play a vital role in steelmaking as worldwide steel. Refinery and coke oven plant feedstock nonferrous metals liquid waste claus process roasting desulfurization synthesis dilute acid max. The leveling element is responsible for leveling the coal charge in the oven, leaving a free gas space below.
Coke dry cooling plant cdcp coke dry quenching plant cdq live model. After heating up the coal into coke, the coke is then unloaded from the oven by a pusher machine. The main function of coke ovens is to convert coal into coke which is used as a fuel and reducing agent in the blast furnace. B longitudinal section, showing left a series of combustion flues in a single flue wall and right part of a long, slotlike oven. A free withdrawal from the seminar is possible until two weeks prior to the. Dunlap carnegiemellon university two processes are currently being employed in north america for the desulfurization of. Tailor made complete coke oven plants from a single source thats our commitment and your advantage gained from a partnership with us. Non heat recovery recovery coke plant non recovery type coke ovens cheaper pollution free operate under slight negative pressure oven 2.
Coke oven, which is a large industrial furnace, is complex in structure. The coke oven managers yearbook 222 general when producing coke by coal carbonisation a large volume of gas is produced. Pdf extension of life of coke oven batteries by hot full wall. Width of the coke oven towards coke side is slightly more than that on pusher side to facilitate easy discharging of coke, as it swells during coking.
After about 50 seconds, that coal will produce one coal coke and 500 mb of creosote oil. In an italian study, no differences in frequencies of chromosome aberrations and micronuclei were found in cultured lymphocytes of 92 cokeoven workers in a steelproduction plant and a group of 19 controls from a nonoven plant in the same area forni et al. The pro cess also includes the processing of coke oven gas to remove tar. Pdf in order to improve the level of management and control of coke. Mod02 lec02 coal carbonization and coke oven plant.
Environmental protection agency innovative strategies and economics group md15 office of air quality planning and standards oaqps air quality standards and strategies division research triangle park, nc 27711 prepared by research triangle institute. In the case of the block of coal, it will take about 450 seconds and produce one block of coal coke and 5000 mb of creosote oil, making it more efficient. The redhot coke is taken to coke dry cooling plant for cooling. Flushing liquor is sprayed into the hot coke oven gases to effect cooling in the collector main.
Coke oven furnaces coke oven european environment agency. Coke oven gas is a byproduct of coverting coal into coke used in steel production. As the coke oven gas is cooled, water, tar and naphthalene condense out. Pdf coke oven intelligent integrated control system. A plant scale trial was conducted to recycle the mill oil waste through non recovery coke oven route. Flexit coke oven door with its flexible stainless steel membrane and door body made of ductile cast iron is particularly suitable for coke ovens with a large chamber height and chamber width. The properties of coke are influenced by moisture content and density. Ensuring reliable operation of your coke oven gas plant is more important than ever in securing a stable supply of clean fuel for your steelworks. Tkisaist2015paperusing modern coke oven technology at.
Heat recovery non recovery coke plant with waste heat boiler. Crude coal tar is a by product of the coking process. The residual coke is pushed out of the oven by pusher car through a guide into coke bucket. The main emission sources from the ovens occur during coke pushing, at which time the oven doors are opened and the coke is exposed to the atmosphere.
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