| As the crude oils become worse, the process of residues becomes inevitable in refining industry. How to choose reasonable technologies to process the residues, getting the maximum profit and meeting the increasing demand of environmental protection, has also turned out to be important strategy in refineries. Considering of the reality of refining industry in China, the technical comparison of two important technologies to process residues, delayed coking and residues hydrotreating, has been done. The profit comparison of the two technologies is also carried out in the aspects of the output value of products, the cost of the processing, the plants investment and the investment profit ratio. Then, the influence degree of the mentioned factors on the economical profit of different technologies is investigated. Finally, taking the Hainan Refinery and the Qingdao Refinery for instances, the technical economy of the two different technologies adopted is compared. The advantages and disadvantages of their producing structures are analyzed.The results shows that the plants investment of residues hydrotreating is higher than that of delayed coking and the total investment is influenced apparently by the ratio between coking investment and hydrotreating investment. The gap of the investment ratio gradually decreases. If the ratio reached 0.8, the residues hydrotreating route has great advantages. The price of crude oil, the plants investment and the price of electricity have bigger influence on economic benefits. Under the condition of high price of oil, the profit of the delayed coking is lower than that of residues hydrotreating and the gap increases with the increase of the crude oil price. The yield of light oil of delayed coking is lower than that of residues hydrotreating by about 5%. The average price of products is also lower than that of residues hydrotreating. However, the delayed coking will have bigger economical advantage if the price gap between light and heavy crude oil approaches not less than $6 per barrel. The hydrotreating process is more easily influenced by feedstocks than delayed coking. Residues hydrotreating shows better prospects from the view of comprehensive utilization and economic benefits of the crude oil. |
