Zhejiang Engineering Design Co., Ltd. is committed to providing clients with distinctive value-added services.
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AboutZhejiang Engineering Design Co., Ltd. (abbreviated as ZEDC in English) was established in 1958, originally known as the Design Department of Quzhou Chemical Plant.
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BlogZhejiang Engineering Design Co., Ltd. (abbreviated as ZEDC in English) was established in 1958, originally known as the Design Department of Quzhou Chemical Plant.
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ResearchThe “ZEDC Chemical Engineering Design Innovation Base” of Zhejiang University is a industry–university–research collaboration institution established through a donation from Zhejiang Engineering Design Co., Ltd. to the Zhejiang University Education Foundation.
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Project Awarded
Shenma Phase II Caprolactam Project
Shenma Phase II Caprolactam Project
On July 26, the second-phase caprolactam project at Shenma successfully completed its trial run. Currently, all key quality parameters of the finished caprolactam have been verified through rigorous analysis and testing as premium-grade products, and the project has smoothly passed its performance evaluation. This milestone signifies that the 200,000-ton-per-year caprolactam production process, under the general contracting of the engineering design firm, is now fully operational.
Optimized design reduces investment and energy consumption.
This project is a key provincial initiative in Henan Province for 2017, with a total investment of approximately RMB 700 million and engineering costs of about RMB 500 million. It features the largest single-unit, 200,000‑ton‑per‑year scale engineering design in China, while also optimizing process technologies to significantly reduce energy consumption—saving roughly 1.2 tons of steam per unit of product—thereby lowering production costs and enhancing product competitiveness.
From 100,000 tons per year to 200,000 tons per year is far more than a simple geometric scaling. To achieve this, the project design team leveraged its own technological expertise and collaborated with partners to develop a new caprolactam production process. Following scale‑up and incorporating ample safety margins in the calculations, Project Manager Jin Xiaomei gained confidence. Drawing on the engineering experience gained from the first phase of the caprolactam plant, the new process incorporates extensive improvements in energy recovery and utilization, as well as in product quality enhancement. The processing capacity of each unit has doubled, while capital investment has increased by only about 20%.
Compared with the first phase, which had a capacity of 100,000 tons per year of caprolactam, the design team implemented substantial improvements in environmental protection. To comply with the new environmental standards, emission limits for certain materials were tightened, and the off-gases from some streams had to be captured and treated. As no mature process was available at the time, the process engineers and designers within the EPC contractor conducted extensive market research and comparative analyses, ultimately selecting an economically viable process scheme that ensured the project’s successful completion.
During the project’s construction phase, the company dispatched design representatives from disciplines including process engineering, equipment, structural engineering, and instrumentation to the site, located 900 kilometers away. They compared as‑built conditions with the drawings, identified errors and omissions in both the construction and design processes, and revised the plans accordingly. On-site, they coordinated among the design team, the contractor, and the owner, proposing effective solutions to address any issues that arose.
Fully committed to on-site support, driving the successful completion of commissioning.