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Qilu Ethylene Expansion Of Energy-saving Technology, Economic Decision-making Evaluation Studies

Posted on:2004-04-30Degree:MasterType:Thesis
Country:ChinaCandidate:Q ZhouFull Text:PDF
GTID:2206360122460973Subject:Power Engineering
Abstract/Summary:PDF Full Text Request
The ethylene devices in Qilu Petrochemical Corp. were established in May of 1987. The designed production capacity of the devices was 300 thousand t/a. During the years from 1995 to 1998 a new enlargement project was taken to increase the ethylene production to 450 thousand t/a. With the increasing demand of the ethylene production and the conflict between demanding and supplying severed. Concerned on the development condition, the Qilu Petrochemical Corp. decided to take a new enlargement project. And two schemes were advanced: they were 600thousand t/a and 720thousand t/a ethylene production. This paper presents the necessity, feasibility of the project. It also compared the two schemes and selected the more reasonable one.(1). This paper analysis and evaluate the necessity, feasibility, the veracity of the market researching and the forecasting about the project. Considered the external condition, the future development target and the core competition capacity, the Corporation determined that the technique retrofit was necessary. As to this project this paper gives a detailed research and evaluation in terms of the industry feature and technique alternation characteristic. The evaluation in this paper is quite correct and impersonal.(2)This paper also presents two schemes of the alternation project and gives detailed comparison of the two schemes. The analysis result shows that the 720thousand t/a ethylene production scheme is better.(3)The evaluation for the reconstruction of ethylene plant has been made on the view of reasonable use and integration of energy. And the methods and measures of energy integration of steam power systems has been discussed in this paper. At the same time the design of the process with energy integration is carried out. Because the reasonable use of energy is considered enough in the reconstruction procedure, not only production size but energy consumption is reduced by 12 to 14 percent, and the consumption of materials and loss rate of manufacture are reduced in different degree.(4)This paper makes an analysis on the technical measures of water saving and environment protection. The advanced technology of water saving, electricity saving and environment protection have been applied to optimize the energy allocation, which not only saves the resources and decrease the consumption of materials but also accomplish the aim of environment protection. These technological measures will contribute for digging the potential, improving the benefits, lowering the costs and increasing the competitiveness in petrochemical enterprises. What's more it is significant to solve the environmental problem of petrochemical enterprises.(5)This paper makes an economical evaluation for the retrofit project of ethylene plants. Aiming at the financial evaluation difference of feasibility research, the reevaluation of which has been made. Based on the financial evaluation, it correct the errors due to relatively high evaluation for the rate of income in the report of feasibility research. As for the computing method, it lays emphasis on the suggestions of exports. And it suggests that the prices of productions are fixed according to the price differences between the raw materials and productions. What's more, the evaluation of benefits has been made according to existing or not for the projects. In addition, it points out that the losses caused by production-stopping and reduction of output because of construction for plants' retrofit.By the all-around evaluation of the technological, economical and constructional conditions, it shows that the project is feasible, which has obvious economical and social benefits.
Keywords/Search Tags:ethylene enlargement project, comparison and selection of the scheme, market forecasting, energy conservation and environment protection, economic evaluation.
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