Experimental Study On Microwave Washing Process For Oily Sludge Cleaning

In China, the oily sludge was included in the national list of hazardous waste. Because of its long-term damage to the environment and potential, people began to pay attention to it. To carry out oil sludge management and control techniques is an important task in the national environmental protection jobs, how to use oil sludge harmless and resource utilization, is an important environmental issues currently solved for the refining industry. In addition, the situation of oil source has become severely in China, and heavy oil or residue is an important chemical raw materials and fuels. So landfill the sludge as a waste is certainly a waste of resources. This topic is expected to solve the problem of oily sludge treatment for the refining industry, and to open up a new way.The oily sludge's source, character and environmental harm are summarized in this thesis. Various ways of present oily sludge disposal, advantages and disadvantages of each technology, economic feasibility have been categorized in parallel. On the basis of comparative analysis of internal and external development in this realm, the feasibility of microwave heat washing oily sludge is testified. This topic select oily sand and suspended oily sludge as the research object, the processing time, power, add Water quantity and pH value as influence factors, sludge oil content as evaluation indexes. The purpose of this paper is to explore various factors on the influence of the sludge oil content and achieve the best technological conditions.First, physical and chemical properties of oily sludge were analyzed out。Then the single factor experiments were processed, the experimental results show that the disposing effect for oily sand is obvious, and for suspended oily sludge is not obvious.Through the orthogonal test of microwave processing oily sand, We get the order of different factors on the influence of oil removal rate:pH> processing time> processing power> Water quantity. By orthogonal experiment we receive the best technological conditions:pH value (11), the processing time (5min), processing power (800w), Water quantity (30mL). Under the optimum operation condition the oily sand was processed twice, and then we measure the oil content fall for 91.13%. So under this condition the oil sand treatment results are ideal. Because of the difficulty of dealing with suspended oily sludge, directly by microwave heating water processing the effect is not obvious. This experiment through the elixir to strengthen microwave processing sludge, the experimental result shows that the broken breast effect of sodium silicate is better. In relatively optimal process conditions for dosing of suspension sludge treatment twice, the oil content of suspended oily sludge reduce 66.97%.In summary, the use of microwave heat washing oily sludge is feasible in technical terms.