Hunan Zhengding Environmental Technology Co., Ltd.

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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.

Shandong Jin Cai Lun

Shandong Jin Cai Lun


Project Overview

  • Shandong Jincailun Paper Co., Ltd., located in Liaocheng, Shandong, is a national high-tech enterprise and a National Green Factory. It also participated in drafting industry standards for lightweight printing paper in China and holds a benchmark position and core competitiveness in the specialty cultural paper sector. The PM18 specialty cultural paper production line project sets strict requirements for the Closed Hood in terms of waste heat recovery efficiency, energy consumption control, operational stability and adaptability for medium-speed paper machines. Zhengding Environment supplies custom Enclosed Hood systems with heat recovery for this specialty paper project, ensuring energy-efficient and stable operation of the line and further reinforcing its advantages in hood matching for high-end specialty paper, while enriching its benchmark cases of energy-saving retrofits for specialty paper.
  • The project has been successfully commissioned and put into operation. The hood and heat recovery system run stably with excellent waste heat recovery efficiency and remarkable energy-saving performance, meeting the requirements for high-quality and low-carbon green production of specialty cultural paper.

 

Scope of Supply

  • Custom complete enclosed hood system with heat recovery is supplied, adapted to the medium-speed specialty cultural paper production line with a web width of 2640 mm and a machine speed of 500 m/min.
  • A dedicated heat recovery system is matched precisely to the evaporation load of the medium-speed paper machine to achieve high-efficiency waste heat recovery and energy saving.

 

Core technology

  • In view of the northern climatic feature of sharp seasonal temperature differences in Shandong, and to meet customized requirements of the specialty cultural paper line for stable drying, high waste heat recovery efficiency, precise dew point control and condensation-free operation, the sealing and thermal insulation structure of the hood as well as equipment operation strategy are optimized. Adaptable to temperature fluctuations throughout the year, the equipment maintains reliable operation in all seasons.
  • The evaporation load and heat recovery ratio are customized for medium-speed cultural paper conditions. Supply and exhaust air parameters and heat load are calculated precisely based on machine speed, drying process and actual evaporation capacity. The waste heat recovery ratio is tailored for high compatibility between the hood and paper machine process to deliver optimal energy-saving performance.
  • In line with the high-quality characteristics of specialty cultural paper, exclusive control ranges for dew point and temperature are defined. Targeting strict standards for sheet flatness and dryness, dedicated supply air temperature and dew point control curves are set to effectively prevent sheet rewetting, wrinkling and condensation defects, steadily improving finished paper quality.
  • The hood insulation structure and heating power configuration are optimized to adapt to the large temperature gap between winter and summer in northern regions. It balances operating conditions across the year and satisfies multiple demands including long-term reliable equipment operation, efficient drying and energy conservation.

 


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