Coke oven plant flow chart understanding sinter and. Introduction coke oven processes the coking coal and converts it into coke in large batteries in a process called coking. Optimization of coke oven gas desulphurization and. Cokeoven gas is a valuable heating fuel that is used mainly within steel plants, for example, to fire. The coaltocoke transformation takes place as follows. The coke oven byproduct plant is an integral part of the byproduct cokemaking process.
This volatile matter leaves the coke oven chambers as hot, raw coke oven gas. The heating process of this coke oven battery was started in may. Coke ovens are mainly constructed of silica, fireclay, high alumina and ordinary insulating bricks. Normal life of a coke oven battery under indian condition is considered to be 25 years. Economics and alternatives for sulfur removal from coke.
The creation of coke and the purification of gas are performed completely automated. An introductory presentation on coke oven plant coke. The residual coke is pushed out of the oven by pusher car through a guide into coke bucket. Process steam is required for the operation of both of these jets. The coke oven byproduct plant is an integral part of the byproduct coke making process. The cokeoven topside sample was found to contain 478 mgkg benzoapyrene nesnow et al. Following condensation of steam, recovered acid gases containing 5570% h2s and 515% hcn are typically sent either to a claus plant for sul.
Pdf coke oven wastewater treatment by two activated. In large coking plants of the iron and steel companies. From coking coal to coke perspectives for met coke. Complemented by the most advanced automation and control systems along the entire coking process, our plants and equipment meet the highest standards in terms of coke productivity and quality, emission control, energy. Mod02 lec02 coal carbonization and coke oven plant youtube. The coke at the top of the blend is ignited by gas burners, that can be fueled by coke oven gas, blast furnace gas, or natural gas. The configuration of a cdq plant is as follows figure 1. The heating of ovens is done from both the sides in side fired batteries. The coalto coke transformation takes place as follows. Suncoke energy our business coke business advanced. The ovens are heated with a mixture of blast furnacetop gas and coke oven gas. Industry profile draft report prepared for daniel c.
Vacuum in the actifier is maintained using two steam operated ejector jets. When the coke is pushed from the oven into a railcar, it is quickly quenched to cool the coke and stop the burning process. Steel production is one of chinas mainly industries, and when producing steel, coke is needed as a fuel. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern the unqualified term coke usually refers to the product derived from low. The following discussion addresses the more common byproduct process.
Coke oven gas is an abundant byproduct of coverting coal into coke used in steel production. Santanu chakraborty, in treatise on process metallurgy. In the cdcp, hot coke from coke oven at a temperature of around 1050 0c is cooled down to cold coke of temperature less than 200 0c. The integration of schalkes coke oven machine technology makes paul wurth a global player for coke making projects. The goals of coking process control are realizing steady heating of coke oven, enhancing production of coke oven and quality of coke, reducing energy consumption and. West, hamilton, ontario l8s 4l7, canada corresponding author. The gas is generated over most of the coking period, the composition and the rate of. Hence, this process is called byproduct coke making. Suncoke energys heatrecovery cokemaking process converts waste heat into steam and electricity, which we can sell to our customers.
The coke making process in these coke oven batteries is called byproduct coke making since the off gas is collected and sent to the byproduct plant where various byproducts are recovered. Subsequent processing of these chemicals produces a large number of other chemicals and materials. The oven has just been pushed and railroad car is full of incandescent coke that will now be taken to the quench station. Hot coke produced in coke oven battery is fed in the cdcp chamber at the top. Our experts help you combat fouling and maximize plant efficiency by supplying heat exchangers customized to your specific operating. Mod02 lec02 coal carbonization and coke oven plant nptelhrd. As larger amount of coal is held in an oven, it significantly reduces the number of pushings per day and hence emissions per ton of coke produced. To reduce costs, improve yields and treat gas in an environmentally responsible way, alfa laval provides highly efficient solutions for refining from primary gas. Pdf extension of life of coke oven batteries by hot full wall. Emissions from the coke process, steel production include. Coal is introduced from the top to produce an even layer of about 60 to 90 centimeters deep.
The schematic diagram of new integrated process of cokeoven gas assisted coal to methanol cogctm is shown in figure 1. The oven is a horizontal design and operates under negative pressure. The construction of the second coke over battery, with same capacity, is also near complete and its heating process will start soon, sources said. During the distillation process, a large amount of gas and smoke is generated, which, after purification, creates coke oven gas, and other byproducts such as ammonia, tar, sulfur, naphthalene, and benzol. Two samples were collected from a modern coke oven. Incandescent coke in the oven waiting to be pushed. The process also includes the processing of coke oven gas to remove tar, ammonia usually recovered as ammonium sulfate, phenol, naphthalene, light. Our competence and knowhow gained through the construction of more than. Coke oven is a key component of the steel mill and coke produced there is charged with iron ore in the blast furnace to produce hot. In the process of converting coal into coke using the byproduct coke oven, the volatile matter in the coal is vaporized and driven off. The heat extracted from hot coke is utilized in waste heat boilers to generate high pressure steam.
The coke ovens are nonrecovery type, which fully combusts the coke oven gas in the ovens as it is generated. 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 main byproduct in the process of coke making is crude coke oven gas and this has a lot of valuable chemicals. Comparative statement of features of non recovery coke. Coke production chemical agents and related occupations. The redhot coke is taken to coke dry cooling plant for cooling.
Shreenath m kalyane 2010a1ps403g rohit vijayavargiya 2010a1ps356g. Our business unit process technologies supplies chemical plants. The coke, when exposed to oxygen, will immediately ignite and begin to burn. Indiana harbor coke company ihcc metallurgical coke plant, consisting of four batteries of 67 coke ovens each to produce coke for ams blast furnaces. Comparison of byproduct and heatrecovery cokemaking. This process consists of heating coking coal in the absence of air to drive off the volatile compounds. This research was carried out to identify the characteristics of the wastewater from coke oven gas cog purification process of the coke plant, and derive optimal operating conditions for the. In nonrecovery coke plants, originally referred to as beehive ovens, the coal is carbonized in large oven chambers figure 3. Sankey iagram for the bypro uct coke oven plant configuration.
As the sinter bed moves, air is sucked from the top through the mixture, enabling combustion through the entire. Adams ii department of chemical engineering, mcmaster university, 1280 main st. Waste water in etp 200910 plant m3tonne gross coke coke oven plants 200910 vizag steel plant 0. Condensed coke oven emissions are a brownish, thick liquid or semisolid with a naphthalenelike odor, while uncondensed coke oven emissions are vapors that escape when the ovens are changed and emptied. The composition may also include benzene c 6 h 6, ammonia nh 3, hydrogen sulfide h 2 s and other components design. 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. Carbonization of coal for metallurgical coke production. Most of the byproduct coke oven batteries are integrated in an iron and steel plant for the purpose of. They are iby product recovery coking process iinon recovery coking process power generation is given in figure 1 non recovery coke oven system by product recovery coke oven system application of heat is bidirectional for converting coal to coke from top to bottom and from bottom to top. In the gasification unit, coal water slurry reacts with oxygen of 95% concentration to syntheses crude syngas. During the production of coke by coal carburization in a coke oven battery a large amount gas is generated due to the vaporization of volatile matter in the coal. Coke oven battery in a coke oven battery, a number of ovens are built in a row with common walls between neighboring ovens. Higher capacity of the coke oven chamber is an important parameter for byproduct recovery type ovens.
The coke oven chimney is made of concrete lined with fireclay bricks. Coke manufacturing industry description and practices coke and coke byproducts, including coke oven gas, are produced by the pyrolysis heating in the absence of air of suitable grades of coal. The upper part is a conventional coal gasification to methanol process. Figure 22 shows the coal processing, figure 23 shows the coke plant, and figure 24 shows the coke processing. A battery consisted of many ovens, sometimes hundreds of ovens, in a row 12. The process is illustrated schematically in figures 22 through 24. Coke oven furnaces coke oven european environment agency. Optimization of coke oven gas desulphurization and combined cycle power plant electricity generation lingyan deng, and thomas a. Slottype coke oven batteries more than 100,000 times worldwide thyssenkrupp industrial solutions has been designing and building coke oven plants for more than years, making it the longest established coke plant engineering company in the world. But the impurities it contains make it unsuitable for use as fuel or feedstock.
A typical heatrecovery facility that we design and operate to produce 1. Coke oven possesses a complex structure, operation condition is extraordinarily tough, and test facility is few, so its hard to realize automatic control. The coke oven gas has a rather high heating value, in the order of 20 kjm3. The oven has just been pushed and railroad car is full of. Bf operator faces dilemma either buy coking coal for own coke plant or buy coke on free market.
The cokeoven main sample was applied topically to groups of 40 male and 40 female sencar mice at doses of 0 control, 0. The flow of coke oven gas is withdrawn from the battery by a centrifugal blower, the exhauster, and delivered through the gas vessels of the byproduct plant at a sufficient pressure for. Pdf coke oven intelligent integrated control system. Coke oven gas processing equipment zvu engineering. Tata steel kalinga nagar starts production from coke oven.
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