Coke Oven

coke oven

[′kōk ‚əv·ən]
(chemical engineering)
A retort in which coal is converted to coke by carbonization.

Coke Oven

 

an industrial unit for coking pit coal. The first coke ovens (”stall” ovens) were used in the early 19th century. They consisted of brick walls 1.5 m high, up to 15 m long, and 2–2.5 m apart. Coal was loaded into the space between the walls, covered with earth on the top and ends, and ignited. Coking lasted eight to ten days. Beehive ovens began to be used in the 1830’s. In this case, coking was performed in closed domed chambers, with limited access of air. Flame ovens with external heating began to be used in the mid-19th century. The coal charge was loaded into chambers lined with firebrick and separated by heating spaces with vertical channels in which coke-oven gas was burned. An important development during the 1870’s involved the recovery of chemicals from coke-oven gas. The coking chambers in the ovens were separated from the heating channels.

Modern coking ovens are divided into horizontal and vertical types, according to the method of charging the coal. Horizontal batch-type coke ovens are the most widespread units. They consist of a coking chamber, heating ducts located on both sides of the chamber, and regenerators. The upper part of the chamber contains loading hatches, and the ends of the chamber are closed by removable doors. The chambers may be up to 13–16 m long, 4–7 m high, and 0.4–0.5 m wide. The chamber is heated by combustion of coke-oven, blast-furnace, or other gases in the vertical channels. The coking cycle of a single coal charge (usually 13–18 hours) depends on the chamber width and the temperature of the heating duct. When coking is complete, the red-hot coke is pushed out of the chamber through the door openings by the coke pusher and is quenched. To make the coking plant more compact and to achieve better use of the heat, coke ovens are combined into groups (61–77 ovens each), with common systems for supplying heating gas and coal and for the discharge of coke-oven gas. All operations concerning servicing of the coke oven (loading, unloading, opening and closing of the doors and hatches, and pushing out and quenching of the coke) are mechanized and automated. Continuous coking ovens, such as the vertical and circular types, are being developed.

D. A. KOPANEVA

References in periodicals archive ?
The objective of the above inspection was to review the condition of production facilities - coke oven batteries, service machines, by-product units, quenching systems, coal and coke handling facilities - with regard to process performance and environmental impact to assess the current situation and provide recommendations for maintenance and repair, identify the optimization potential and additional environmental protection measures.
Contract notice: Provision of Renovation coke oven battery 1.
It captures the entire volume of gas generated during the heating of coals in coke oven batteries and purifies it, while the chemicals released during the purification process are further processed into products for third parties: crude benzene used as feedstock in the chemical industry, and ammonium sulphate used in the production of nitrogenous fertilizers in the agricultural sector.
Currently, control rooms 2 and 5, which hold the equipment and controls necessary to clean the coke oven gases, remain shut down.
Summary: The explosion took place around 11 am in a gas pipeline connected to the coke oven section of the plant
<B Benjamin Winstone, left, and his son-inlaw, retired coke oven worker David Harper
These coke briquettes were analyzed and compared to the quality of conventional coke made commercially in coke oven batteries used around the world.
(HCCL) has invited bids from companies interested in rebuilding a coke oven battery that was decommissioned four years ago, according to Nehanda Radio.
The GLO was applied for after these firms were approached by more than 340 former coke oven workers suffering health problems related to their employment years ago.
AFORMER British Coal coke oven worker and a fellow colleague's widow are fighting for justice after the two men contracted lung disease.
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PSM's Spokesman, while talking to reporter here on Tuesday, said since June 10, 2015 two blast furnaces and two coke oven batteries (having 49 ovens each) have been put simply on hot mode to save these very important and sensitive installations from freezing and destruction.