Apr 06, 2016 advanced technologies for desulphurisation of coke oven gas 6 april 2016 6 april 2016 robertopensa paper presented on icc 2009, 2022 january 2009, ranchi, india. Scribd is the worlds largest social reading and publishing site. The coke oven byproduct plant is an integral part of the byproduct cokemaking process. The coke oven chimney is made of concrete lined with fireclay bricks. Jan 17, 2019 the coking process generates the following main volatiles as byproducts. The chamber is 20mm tapered from ps to the cs of the battery.
Through the website i share my knowledge and experience gained through my association with the steel industry for over 54 years. The practical running results indicate that the system can achieve heating intelligent control of coke oven, stabilize production of coke oven, effectively improve quality of coke and decrease. Oct 18, 2015 coke ovens are mainly constructed of silica, fireclay, high alumina and ordinary insulating bricks. 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 coking oven battery is heated by vertical heating walls which can consist. 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. A battery for heating caking coal is of a shape in which many ovens having a width of approximately 45 to 55 cm and a height of 6 to 7.
Each battery consists of at least 80 100 coke ovens. A typical heatrecovery facility that we design and operate to produce 1. Nov 15, 2014 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. The heating of ovens is done from both the sides in side fired batteries. Coke is the carbon product that is formed by the thermal distillation of coal at high temperatures in the absence of air in coke oven batteries. The ovens are arranged side by side and charged and discharged on a cyclical basis, in a continual process, with gaseous products being taken off in a controlled manner to a gas handling plant.
In modern advanced control system of coke oven, the control scheme of feedback combined with feedforward, and control merged with management are widely utilized. Operation of cuttingedge coke oven having all of durability. At present, all those batteries are back in operation. At the roof of each oven there are 3 oven holes which are closed with refractory lined lids and another opening which is connected to the gcm via stand pipe. The cokin chamber is generally from 30 to 42,6 f8et it\. The rear portion of the battery of coke ovens comprising a coke guide 17 longitudinally movable on rails 17 1 so as to stand in front of the rear opening 8 1 of the oven chamber 8 to defourner, and a coke car 18, longitudinally movable drums 18 on rails 1 so that during the discharge of coke ovens of a cell 8 by the ram 15 2, the coke cake is. In the battery, the coking chambers are alternated with the heating chambers 3. The redhot coke is taken to coke dry cooling plant for cooling.
Special coke plant specific measuring and evaluation systems are assisting the optimization models. May 10, 2015 this feature is not available right now. Industry profile draft report prepared for daniel c. The oven has just been pushed and railroad car is full of incandescent coke that will now be taken to the quench station. In modern advanced control system of coke oven, the. The coke generated after heating has a high heating calorific value and is used for burning purposes in blast furnace.
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 processing of the coal is then carried out in the absence of air at temperatures of up to 0 c. Fugitive coke oven gas emission profile by continuous line. The gas flows to the coke oven battery are conducted in the direction of battery length, oven length and oven height, which require an adaptable distribution of media. The different ovens are disposed side by side and charged and discharged on a cyclical regular basis, in a continuous way, being the gaseous products subproducts taken off in a. Heavy residual separator clean coke oven gas distribution battery heating. Pdf extension of life of coke oven batteries by hot full wall. A single coke oven consists of a coking chalnber clnd a heating chamber. This process avoids melting the battery brick work the flame temperature is above the melting point of the brick and provides more uniform heating of the coal mass. Therefore, how to save energy, promote production and quality of coke are key problems of coke oven control and management. Hence, this process is called byproduct coke making. The majority of coke produced in the united states comes from wetcharge, byproduct coke oven batteries figure 1. Depending on the customers needs and requests, we provide the tailormade design and stateoftheart technologies for coke oven batteries of top charging as well as of stamp charging type. Tkisaist2015paperusing modern coke oven technology at.
Ep0089862a1 coke oven battery and process for repairing. Normal life of a coke oven battery under indian condition is considered to be 25 years. Coke oven gases cogs are emitted during the cokemaking process through handling, charging, oven leaks, pushing, quenching, combustion, and foul gaspurifying steps figure 1. Process data from the field, calculated data processed by the plcs as well as important data from the models and as. Pdf coke ovens play a vital role in steelmaking as worldwide steel. In order to improve the level of management and control of coke oven, the research on intelligent integrated control system is carried out. Oct 04, 2015 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. The operation of each oven is cyclic, but the battery contains a sufficiently large number of ovens to produce an essentially continuous flow of raw coke oven gas.
More detailed process descriptions are provided in appendix d. Pdf coke oven intelligent integrated control system. Concept and operating results of a higherlevel automation. Heating chamber the heating flues of coke oven batteries are divided into 14 pairs of vertical flues. A brief description of each coking process is presented here. The practical running results indicate that the system can achieve intelligent control of coke oven heating process, satisfy the actual production need, and has great practical value. From coking coal to coke perspectives for met coke. Carbonization of coal for metallurgical coke production.
The walls 33 of sidewalls 9 also forming the walls of the furnace cells exhibit, close to at least one of their adjacent ends to the front and rear openings of the cells of ovens, a vertical joint plane 39 established along a vertical alignment of one of the lateral faces of the bonders 36, the two contiguous stretchers upper and lower beds to those contennant these headers being one. China experience october 2017 stockcode 1618 hong kong 601618 shanghai confidential and proprietary any use of this material without specific permission of mcc is strictly prohibited. Important questions arise here regarding the thermal and technological conditions in superlong coke oven. The properties of coke are influenced by moisture content and density. 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. Ep0089862a1 coke oven battery and process for repairing old. Suncoke energys heatrecovery cokemaking process converts waste heat into steam and electricity, which we can sell to our customers. Most of the byproduct coke oven batteries are integrated in an iron and steel plant for the purpose of coke oven gas. Before carbonization, the selected coals from specific mines. In the process of converting coal into coke using the byproduct coke oven, the volatile matter in the coal is vaporized and driven off. Approximately 950011,500 ft3 of coke oven gas is released1,2 from a ton of coal during the cokemaking process. Suncoke energy our business coke business advanced. Operation and preservation of coke ovens in the current economic. Coke oven intelligent integrated control system semantic.
The main byproduct in the process of coke making is crude coke oven gas and this has a lot of valuable chemicals. 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. The beehive coke oven design emanated from the charcoal kiln process practiced earlier. Oct 04, 2018 coke makers use a mix of coal to improve the quality of coke they create. Beehive process is a self heating process where the volatile matter is burnt over the coal charge under restricted and directed air supply, and the radiant heat bounces back to the charge from its arch shaped roofs. Coal chemical plant recovers ammonia nh 3, tar and benzol from cogas.
Esposito, head of business unit coke, paul wurth italia s. Higher capacity of the coke oven chamber is an important parameter for byproduct recovery type ovens. From coking coal to coke perspectives for met coke production in european union. Santanu chakraborty, in treatise on process metallurgy. Coke is used in the blast furnace to provide a reducing atmosphere and is also a source of fuel. The actual chemical content of the emissions depends on the process variables. Advanced technologies for desulphurisation of coke oven gas. Coke oven is key thermal equipment and consumes energy massively in the metallurgy industry. A scheme of the total process of conventional coking is shown on fig. Coke oven gas processing equipment zvu engineering. Environmental control and emission reduction for coking plants. For the production of this material, the coke oven is filled with coal through the filler holes in the oven roof. Bisogno, engineering head coke oven battery, paul wurth italia s. The entire cokemaking operation is comprised of the following steps.
Fulfilled environmental specifications by a comprehensive coke. The residual coke is pushed out of the oven by pusher car through a guide into coke bucket. Coke oven batteries cokemaking our activities site. In the field of top charging batteries, paul wurth favours the jumbo oven battery concept with substantial ecological advantages and a long battery lifetime. Coke oven battery 5 p rimary coolers warm sump flushing liquor tank flushing liquor heavy residual steam exhauster tar separator final coolers boiler benzol clean gas back to coke ovens battery 5 scrubbers flair ammonia scrubbers clean ga to pta crude benzol plant 4. 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.