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致力于节能减排技术的研发与应用，现有业务聚焦于造纸行业重要设备的设计、制造、销售以及与节能降耗和环境保护相关的技术服务和工程实施 -
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Collaboration Cases
Focusing on the research, development, and application of energy-saving and emission-reduction technologies, with deep expertise in energy efficiency and consumption reduction within the ventilation and drying segments of the paper-making industry.
Yunnan Dongsheng
Project Overview
- Yunnan Dongsheng Paper Industry Co., Ltd. is a key pillar enterprise in Yunnan’s packaging paper sector, with leading production capacity and product quality within the region. The company has launched a new PM3 high-speed, wide‑web packaging paper machine project aimed at boosting its output of premium packaging paper and enhancing production efficiency, while establishing an industry‑leading, intelligent, and environmentally friendly production line. Operating under conditions of wide web, high speed, and substantial evaporation loads, the project sets exceptionally stringent requirements for the operational stability, drying uniformity, energy‑saving performance, and long‑term reliability of its enclosed hood, ventilation system, and heat recovery system. Zhengding Environment tailored a comprehensive solution for the enclosed hood, ventilation system, and heat recovery system, and, thanks to its reliable delivery and outstanding operational results, was awarded the “Precision Quality Award” by the client, further strengthening the company’s reputation as a specialist and its brand influence in the field of high‑end, wide‑web, high‑speed packaging paper equipment.
Scope of Supply
- Custom-designed, fully integrated enclosed hood system, tailored to meet the demanding production conditions of packaging paper at an ultra-wide web width of 6,800 mm and a high-speed evaporation rate of 1,100 m/min.
- Equipped with a dedicated ventilation system, it precisely meets the air supply and exhaust requirements of wide-web paper machines, ensuring uniform drying across the entire web and stable airflow.
- Equipped with a high-efficiency heat recovery system, it effectively reduces production energy consumption and meets green and energy-saving standards for packaging paper manufacturing.
- We provide end-to-end, one-stop services, fully responsible for the project’s overall scheme design, complete equipment supply, on-site installation and commissioning, and comprehensive technical support throughout the entire process.
Core technology
- Taking into account Yunnan’s warm, humid climate, and in response to the project’s stringent requirements for condensation prevention, uniform drying, energy efficiency, and long-term stable operation, a custom-designed air‑cushion insulation and waste‑heat recovery solution has been developed to suit the local environmental conditions. The equipment’s sealing and thermal insulation have been reinforced to align with the region’s climatic operating parameters, ensuring reliable year‑round performance.
- The evaporative load and airflow balance are custom‑designed to meet the operating conditions of wide‑width, high‑speed packaging paper. Based on the production characteristics of a 6,800 mm web width and a machine speed of 1,100 m/min, as well as the drying process and substantial evaporation requirements, the total supply and exhaust air volumes and the lateral airflow distribution are precisely calculated to ensure uniform drying across the entire web width—eliminating both dry‑spot and wet‑spot issues—and achieving optimal adaptation to high‑speed continuous production.
- Designed to meet the demands of high-speed, high‑intensity continuous production, it employs a dual closed-loop intelligent control system that integrates dew point and temperature regulation, with an optimized high‑dynamic PID control logic. This ensures precise and stable exhaust dew point and supply air temperature, effectively eliminating the risks of condensation, dripping, and paper breaks, thereby guaranteeing continuous, efficient, and stable operation of the packaging paper production line.
- Optimize the operating ratios of the waste heat recovery system to maximize waste heat recovery efficiency, significantly reduce steam consumption on the production line, and achieve the dual production objectives of long-term equipment stability and energy conservation.
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Yunnan Dongsheng
Yunnan Dongsheng
Yunnan Dongsheng
Contact Information
Mobile: +86 18807310558 / +86 13907318443
Email:postmaster@hnzdep.com
Address: Room 908–909, New World Chuangdi, No. 139, Laodong East Road, Yuhua District, Changsha City, Hunan Province
Xiangtan Branch: Yuhu High-Tech Industrial Development Zone, Xiangtan City, Hunan Province, China
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