Worldwide energy crisis forced the researchers to explore for new and alternate sources of energy. For the developing countries this problems are acute. Generation of any kind of waste is a problem to the environment. Some wastes have the characteristics of producing energy by different thermochemical conversion. In the present work, waste tires were pyrolysed in a fixed bed reactor. The influe...

Aiming at the shortcomings of current widely used contact and noncontact tube metal temperature measurement technology method diagnosing degree coking furnace tube, a new (TMT) predicting trend were introduced in this study. Also, referring to generation intelligent temperature-measuring devices developed for measuring TMT, an temperature-processing algorithm based on machine learning neural ne...

Carburizing is the main damage form of ethylene cracking furnace tubes. In this process, microstructure tube would change and element diffuses redistributes. After serving for about 41000h, radiation section a plum blossom SC-1 tubular from petrochemical company was tested analyzed in article. Results show that higher service temperature, more serious carburizing tube. inner-wall carburized zon...

In reactor furnace, due to high temperature and high pressure, data can be measured only near the furnace wall. In this paper, the way to estimate temperature distribution in a reactor furnace using measured data near the furnace walls and to control temperature distribution to the desired temperature distribution was studied. In the estimation, SQP method is employed using measured data near t...

The cracking furnace is the key equipment of ethylene unit. Coking in tubes results from generation coke during cracking, which will compromise heat transfer efficiency and lead to shape change tubes. In order keep operating economically safely, engineers need decoke according surface temperature tube. However, tube difficult obtain practice. Due redundant instrumentation high level process con...

improvements in the properties of ordinary sidewall compound (nr/br) with the addition of epdm by reactive processing method were evaluated. the results show that ozone resistance of these sidewalls was improved with increased addition of epdm. also the tensile strength and elongation-at-break were increased in comparison with nrbrepdm compounds that were made by non-reactive processing. sem ph...

Database cracking has been an area of active research in recent years. The core idea of database cracking is to create indexes adaptively and incrementally as a side-product of query processing. Several works have proposed different cracking techniques for different aspects including updates, tuple-reconstruction, convergence, concurrency-control, and robustness. However, there is a lack of any...