Reducing emissions to the environment in the production of petroleum coke on delayed coking units
The sources of emissions to the environment from the delayed coking unit operating on the mixed raw material (tar mixed with heavy cracking gas oil) have been analyzed. The contribution of technological units to the total emissions of the production facility has been determined and the main source of emissions to the environment has been established. The greatest amount of emissions occurs during the reactor unit operation. The technological scheme of the delayed coking unit is analyzed. The measures to reduce emissions from the reactor unit are developed. The fractional composition and density of condensed products from the coke oven chambers were determined at various times during the coking cycle. The products studied are a mixture of gasoline and gas oil (diesel) fractions. When preparing and studying a mixture of light gas oil coking with condensed oil products from the coke ovens, the possibility of their involvement in the main stream of light gas oil coking used as a component of commercial diesel fuel has been established. Non-condensed products from coke oven chambers are hydrocarbon gas with particles of coke and traces of water. Measures have been developed to improve the quality of gaseous products for directing them to gas fractionation units and to eliminate emissions into the atmosphere. The environmentally safe and economically feasible scheme of the block utilization of the products of heating chambers, steaming and cooling of coke is proposed. After the implementation of measures, the amount of emissions to the environment from the installation will decrease by more than 50% while simultaneously increasing the output of high margin oil products.