Yield of Yuneng Hua DCC unit reaches design value 　　

　　Sinochem News Network News recently extended the twelfth meeting of the joint research team for residual catalytic thermal cracking (DCC) units held by China Coal Yuneng Chemical Company
.
After nearly 4 years of technical research, the long-standing problem of low yields of ethylene and propylene in the company's DCC unit has been resolved
.
The ethylene and propylene yields of DCC units increased from 33.
44% in 2018 to over 36.
60%, reaching the design value
.

　　The company's 1.
5 million tons/year DCC unit adopts the patented catalytic cracking technology developed by Sinopec Petrochemical Research Institute.
It uses the atmospheric residual oil from the internal refinery of Yanchang Petroleum as raw material to produce ethylene and propylene through catalytic thermal cracking
.
Since the plant was built and put into production, due to various reasons, the yield of "diene" has been a major bottleneck restricting the first phase of Yuneng Hua's start-up project to achieve full production and efficiency
.

　　To this end, the company set up a joint research team with patent dealers and design units.
Through multiple joint technical research, the operating efficiency of the device and the performance of the special catalyst have been significantly improved, basically realizing the stable, long-lasting and optimal operation of the device, and improving the overall device.
Operational economic benefits
.

　　This joint research group meeting mainly analyzed the impact of the current raw material residue quality changes on the operation of the unit, and put forward suggestions for next-step operation adjustment and catalyst improvement, laying a foundation for continuously improving the yield of "dienes" and reducing the unit consumption of catalysts
.
It is understood that the joint technical research team, represented by Professor Xie Chaogang, a senior expert of Sinopec Group Corporation and the inventor of DCC process technology, entered the DCC plant site in mid-May and carried out a half-month technical service work
.
The expert team went deep into the field, tracked and analyzed the operation data of the device, and conducted in-depth discussions with the relevant production technicians of the company to analyze the operation of the DCC device, and put forward optimization measures.
Through the performance assessment of the device, the expected goal was achieved
.

　　In the later stage, the company will continue to carry out joint technical research with the Academy of Stone Science on the impact of the constant changes in the properties of imported raw materials on the yield and catalyst consumption
.