Technical features of sichuan zhongwang large high-end petrochemical polyolefin extrusion granulation unit

Sichuan Zhongwang Technology's Strength and Breakthrough in Large Extrusion Granulation Unit

Innovation achievements:

1. Continuously develop new functional structures and components.

The continuous optimization of the structural parameters of mixing components can be adapted to meet the mixing requirements of more resin grades.

High torque technology for gear transmission, high reliability, and uniform design technology are more suitable for the processing operations of high-viscosity materials and large-scale requirements.

4. Key component materials and process technology.

Advantages:

Durability, stability, and efficiency comparable to top foreign brands.

The frequency of unplanned shutdowns per year is less than five times, which is comparable to Japan's JSW and Germany's Coperion.

Sichuan Zhongwang Technology Strength and Breakthrough in Polymer Post-Processing and Devolatilization Reaction Unit

Innovation Achievements:

1. Twin-screw devolatilization extruder

2. Multi-stage Vacuum Control

Advanced Stripping + Decentralized Distribution Devolatilization

The residual solvent can be reduced from 5%–40% to 300 ppm.

Transmittance ≥ 93%, Yellowness Index ≤ 0

Application scope: POE, EPDM, FDPE, POM, PMMA, POM, PPC, and other metallocene solution process polyolefin products.

Design capacity: Single line annual output of 50,000 to 200,000 tons

Representative Performance:

Single-line thousand-ton-per-year POE devolatilization extrusion granulation unit

Single-line annual production of 50,000 tons PPC devolatilization granulation unit

Single-line PMMA devolatilization and granulation unit with an annual output of 80,000 tons

Single-line 200,000-ton-per-year solution process FDPE (octene copolymer) devolatilization extrusion pelletizing unit

Sichuan Zhongwang: Strength and Breakthrough in the Localization of Spare Parts for Imported Extrusion Granulation Units

Innovative Achievements:

The original replacement of the barrel of German and Japanese large extrusion granulation units to enhance wear resistance and corrosion resistance, repair, and optimize redesign and manufacturing.

2. Original replacement and optimized redesign and manufacturing of screw elements and mandrels for German and Japanese large extrusion granulation units.

Upgrading the inner surface hardness of the cylinder (using advanced laser welding repair technology from German Yasen University of Technology to enhance the cylinder's...

The service life can be increased by more than five times.

The latest process extrusion granulation unit's old barrel is repaired and upgraded, using laser welding alloy for efficient repair of the barrel with worn inner bore.

07A well-known domestic petrochemical company

The imported ZSK320 large extruder unit had been experiencing gearbox noise and vibration issues, which remained unresolved despite repeated repairs by the original manufacturer and other domestic companies over a period of two years. This resulted in long-term low production capacity. Upon receiving the maintenance task, our company responded immediately and completely resolved the issue in just 13 days, restoring production capacity to normal levels.

08A large foreign petrochemical enterprise

Due to the failure of the imported ZSK177 gearbox which was beyond repair, a special trip was made to China to commission our company to manufacture a replacement gearbox in situ. We formed a professional technical team for design and manufacturing, and dispatched experienced assembly personnel to provide on-site guidance for installation and commissioning. After the equipment was started and put into operation, it achieved 100% of the original factory's production capacity, earning high praise and recognition from the customer.

09JSW 230X-12AW gearbox maintenance

In 2021, for the maintenance of the JSW 230X-12AW gearbox of a large domestic chemical group, our company, as a professional service provider, offered comprehensive technical guidance, saving a substantial amount of maintenance costs for the client.

10Import of extrusion machine equipment and gearbox maintenance and replacement

The POM equipment of CNOOC Tianye Chemical (Italian Maris TM223) experiences periodic abnormal vibrations and current fluctuations during the polymerization reaction process.

By modifying the gearbox structure, the issues of severe wear on the gearbox output splines, reduced bearing life, severe wear on the splines at the connection between the mandrel and the gearbox, and severe wear on the cylinder and threaded block caused by periodic strong vibrations have been resolved. This addresses the key technical challenge of long-term equipment operation. At the same time, components such as the cylinder, mandrel, and threaded block have been replaced. Through the modification of the gearbox structure, the problems caused by periodic strong vibrations have been resolved.