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The Sludge whether reasonable treatment and disposal related to the the city healthy development , therefore , the sludge disposal problem to get the attention of the world , looking for a reasonable sludge treatment method imminent . The sludge pyrolysis oil technology is considered sludge sound , reduction and resource development prospects . However , the quality of oil obtained by the sludge currently studied in low-temperature pyrolysis technologies . In this paper, the YPC sewage treatment plant sludge as raw material , sludge pyrolysis characteristics ; through the tests were to determine the optimum conditions for sludge pyrolysis and catalytic cracking , sludge pyrolysis obtained through the experiment showed maximum oil production rate reaction conditions as follows: reaction temperature of 470 ° C , reaction time 70min ; sludge catalytic cracking for maximum oil production rate reaction conditions : a period of thermal decomposition temperature of 420 ° C , the pyrolytic reaction time 60min , Sec catalytic cracking temperature 460 ℃, the catalyst bed volume in the 20 mm × 30mm . Oil production rate calculations , elemental analysis , thermal gravimetric analysis compared two oils obtained under optimum conditions , such as GC -MS method , the results show that the catalytic cracking of oil production rate decline , but the catalytic cracking aliphatic compounds content of the oil increases, the decrease in the content of oxygen-containing compound , PAHs , and improve the safety of the oil , so that oil quality is improved . The influence of the kind of catalyst for catalytic cracking experiments show that the HZSM -5 (50) as the catalyst to obtain a high oil production rate , HZSM-5 (50) catalyst regeneration experiments , the results show that , prior to regeneration of the catalyst , producing three times oil rate of change is small , after four , the oil production rate dropped significantly .
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