Patent GB-190618828-A (GB)
Title: Improvements relating to Coke Ovens.
Inventor: GOBBE OLIVIER
Filed: 1906-08-22
Granted: 1907-08-22
Abstract: 18,828. Gobbe, O. Aug. 22. Gas manufacture, processes for; water gas and producer gas.-Relates to a process and an apparatus for coking by the circulation of hot gases. The ovens used are shown in longitudinal section in Fig. 1 and in sections on the lines G-G, A-A, B-B in Fig. 2. The ovens are arranged in pairs which communicate through channels b set between grates c<1>, c<2> and d u s t collecting-channels d<1>, d<2>. Flues k, l, communicating at one end of the battery through a flue provided with a fan, open into the oven a' through apertures g<1>, m<1>, and into the oven a<2> through similar apertures. A flue p is provided, by which air may be supplied through apertures r<1>, r<2> to the ovens, and also through flues u to the channels b. Gases may be led to a by-product plant through ports hand a main o. Charging- holes x<1> are formed in the ovens. The ovens are first heated by burning wood in the oven a<1> by means of air injected through the aperture r<1>, the flames passing through the channels b and out through the charging-holes of the oven a<2>. When the ovens are hot, a thin layer of coal is charged into the oven a<2> and coked by burning wood in the oven a', the gases being still allowed to escape. The oven a' is then charged and the bells of the flues k, l are set so that the gases from the charge are circulated through the channels b and the hot coke in the oven a<2>. As the coking of the charge in the oven a<1> proceeds, the volume of gas evolved increases and at some stage the bells of the main o are opened and the gases are led to the by-product plant, the residual gases being utilized for illumination or heating purposes. When the coke in the oven a' is cold, the coal in the oven a<1> will be coked. The oven a<2> is then drawn. Before re-charging the oven a<2>, the channels b and the oven a<2> are heated. This heating is effected by burning some of the coke of the oven a<1> or some of the distillation gas or some gas from an external source according to the class of coke required. For producing soft coke, air is injected through the flue p into the oven a<1>, and also through the flues p into the channels b, the flames passing out the charging hole of the oven a<2>. When the channels b and the oven a<2> are sufficiently heated, the oven a<2> is charged and coking is effected by circulating the gases through the oven a<1>. For producing metallurgical coke, the reheating is effected by setting the bells so that distillation gas is forced into the oven containing red coke. The gas descends into the channels b and is there burnt by air supplied through the flues u. By operating in this manner, the heavy hydrocarbons in the gas are deposited in the coke, thereby increasing its density. In some cases the density of the coke may be further increased by spraying tar into the gas supplied to the oven a<1>. The gas passed into the ovens is taken from the mains at a selected period of the coking depending on whether it is required to utilize the gases of high illuminating or high heating power. An increased yield of ammonia may be obtained by introducing steam into the circuit. In some cases the charges may be coked by the circulation of gases, such as water gas, from an external source.