As the increasingly strict emission regulations, develop new and efficient desulfurization equipment, to meet the requirements of future Marine sulfur emissions control, ensure freedom of navigation in all waters of the ship, we need to desulfurization of diesel engine emissions. Waste desulfurization generated also need to process and strict inspection to reach the discharge standard of corresponding IMO. The main purpose of this paper is to study a new system for processing waste engine emission for marine diesel engine, this system will make waste liquid treatment becomes more efficient, energy saving, but also saves the cost of waste water treatment. This paper introduces a new technology for processing ship washing desulfurization waste liquid, we analyze the advantages and disadvantages of this equipment. Finally, this method gives the improving measures for the problems and prospects for the development trend of ship desulfurization wastewater treatment.

As international oil price rise rapidly, the proportion of the fuel cost share of the transport cost has become increasingly high. At the same time, in order to reduce CO2 emission, the meeting of MPEC formulated and adopted the resolution on EEDI, so saving energy and reducing emission has become a marine industry benchmark. In this paper, through the study on marine diesel engine waste heat recovery system with multi-stage flash, establishing the universal model of multi-stage flash unit, and optimizing the parameters of the low-temperature waste heat recovery system with multi-stage flash. This paper constructs the power equation in matrix model, and each matrix of the model has a simple rule to be filled in, which make it versatile, and suitable for computerization, through estimating the power generation and CO2 emission reduction of the system on main diesel engine different loads, analyzing the waste heat recovery system with economic method finally.