Extraction of charge gases from coke ovens
OwnerHeinz Holterinventor
Life of this patent
Estimating the term…
Abstract
Gases formed on charging a coke oven are extracted, burned and washed. A gas-handling system, mounted on a machinery truck of the coke-oven plant, is used. An extractor unit of the system comprises an extractor conduit which is connected to an updraft pipe of a coke oven during charging of the oven. The gas-handling system specifically comprises a combustion chamber shaped and dimensioned to ensure a gas flow at a velocity which does not exceed 10 meters per second. The combustion chamber comprises a heat-retentative lining to ensure that the temperature within the chamber does not fall substantially below the ignition temperature of charge gases between successive charging operations.
Claims14
In a coke-oven plant comprising a battery of coke ovens and a gas-handling system for handling gases arising from coke-oven charges and comprising a combustion unit, the improvement wherein:
- I. the gas handling system is mounted on a truck for movement lengthwise of the coke-oven battery;
- Ii. the combustion unit comprises a combustion chamber which is shaped and dimensioned so that charge gases passing therethrough have a flow velocity which does not exceed 10 meters per second;
- Iii. the combustion chamber has heat-storage lining means to maintain a temperature in the chamber between successive charges which is not significantly lower than charge-gas ignition temperature.
In transportable means for extraction by suction and subsequent combustion and washing of gases arising from charging one of a battery of coke ovens, said means comprising suction, combustion and washing units, the improvement wherein:
- (a) the suction unit is provided with a conduit whereby the unit may be connected, during charging of a selected coke oven, to an updraft pipe of the coke oven;
- (b) the combustion unit comprises a large combustion chamber for burning all charge gas which has been aspired, the chamber having a cross-section which is sufficiently large to ensure a flow velocity of charge gases to be burned which does not exceed 10 meters per second, the chamber walls being provided with a ceramic lining which acts as a heat store to maintain a minimum required ignition temperature between successive charging operations;
- and
- (c) the suction, combustion and washing units are mounted on a machinery truck.
In a method for burning, in a combustion chamber, coke-oven gases produced in a battery of successive coke ovens, the improvement which comprises, in combination:
- a. mounting the combustion chamber on a movable truck,
- b. passing gases from each of the successive coke ovens sequentially into said combustion chamber at a flow velocity which does not exceed 10 meters per second and for a period sufficient to burn the gases completely, and
- c. providing the combustion chamber with a refractory lining means to maintain a sufficient heat level between gas charges to ignite charges from successive coke ovens substantially without supplementary heating means.
Dependencies are inferred from the claim text.