Yangzi Petrochemical Technology Empowers Waste Reduction and Increases Efficiency

　　In July, Yangzi Petrochemical Co.
, Ltd.
officially launched the establishment of a "no-waste enterprise" and became one of the first pilot enterprises of Sinopec Group Corporation
.
Since the beginning of this year, Yangzi Petrochemical has made great efforts to solve the difficulties and blockages of large amount of solid waste, especially hazardous waste, difficulty in transferring across provinces, and high management cost through technical research
.
It is expected that in 2025, the company will achieve a 20% reduction in the amount of hazardous waste generated compared with 2020, and the outsourced disposal of hazardous waste with gross production value will drop to 2.
8 kg/10,000 yuan
.

　　Introduce new equipment to slim down the sludge

　　In order to maximize the reduction of waste at the source, the company actively carried out internal exchanges in the industry.
In early March, the company introduced a two-way self-cleaning dryer, and used a new steam drying technology to replace the original electric heating to treat the liquid sludge
.
According to the Licensing Office of the Production Supervisor of the Jingyi Unit of the Water Plant, this technology can reduce the moisture content of the sludge after drying from 62% to nearly 30%, turning it into powdery sludge, which is expected to reduce the amount of sludge by 2,000 tons per year.
Conducive to saving transportation costs and subsequent resource utilization
.

　　Applying new technology to "re-employ" spent catalysts

　　Following the principle of waste resource utilization, Yangzi Petrochemical tried to apply the magnetic separation and recovery technology of waste fluidized catalytic cracking (FCC) catalysts.
Through permanent magnet and physical separation processes, the waste catalysts had a short service time, low heavy metal content, and remained relatively stable.
The highly active and selective low magnetic agent is separated and returned to the device for use
.

　　Compared with the previous treatment method of using outsourced low-magnetism agent to reduce the consumption of fresh agent, on the one hand, this technology reduces the disposal amount of waste catalyst as hazardous waste, and on the other hand, it avoids the waste of outsourced low-magnetism agent from different devices.
The adverse effects of agent separation, quality and index differences on the operation process
.
According to the project leader, Ye Hui, the project has entered the basic design stage and is scheduled to be completed in March next year.
After it is officially put into use, about 30% of catalysts with low pollution and high activity can be directly recovered
.

　　Relying on new installations to grow "responsible fields" for waste disposal

　　In addition to reducing the amount of waste generated at the source, Yangzi Petrochemical has also carried out a lot of work to improve the quality and efficiency of waste utilization and disposal processes
.
The company relies on the delayed coking unit of the refinery to establish a normalized utilization and disposal channel for low-risk hazardous wastes such as waste amine liquid and sewage scum
.
They also rely on the olefin plant waste alkali wet oxidation device to dispose of the waste alkali from the ethylene plant and the oil refinery plant to the maximum extent; through the circulating water of the water plant or the sewage treatment device, the waste inorganic acid and alkali generated in the laboratory are recycled in a timely manner
.
At the same time, they have in-depth research and development of the "solid waste management" module in the "Smart Environmental Map" management and control platform to ensure the whole-process and full-dimensional legal compliance management of solid waste, and strengthen the building of solid waste supervision and monitoring capabilities
.

　　"Being one of the first batch of pilot units is both an honor and a driving force
," said Ren Yaojie, deputy manager of the safety and environmental protection department of Yangzi Petrochemical, "We will go all out to build Sinopec's model, and help the group company's 'Waste-Free Group' and Nanjing's 'Waste-Free City' construction.
, guided by the new development concept, promote the transformation of the development model, and make green the brightest background of enterprise development
.
"