Product – Hunan Zhengding Environmental Technology Co., Ltd.

ZhengDing is a professional manufacturer of Yankee Hood Systems for tissue paper machines, providing customized drying solutions for new production lines and existing machine upgrades. Our Yankee Hood System combines high-velocity hot air impingement drying with Yankee cylinder contact drying to improve drying efficiency, increase production capacity, and reduce energy consumption. With optimized airflow distribution, precise temperature control, and efficient heat recovery, the system ensures stable drying performance and consistent tissue paper quality. ZhengDing provides complete Yankee Hood solutions, including engineering design, equipment manufacturing, installation, commissioning, and technical support.

Technical Advantages of ZhengDing Yankee Hood System

1. High Drying Efficiency

The optimized impingement hole arrangement maximizes drying capacity and ensures uniform moisture distribution across the paper web, improving drying performance for high-speed tissue paper machines.

2. Energy Efficiency and Heat Recovery.

Advanced heat recovery system design improves thermal energy utilization, reduces steam consumption, and helps lower carbon emissions and operating costs.

Exhaust Air Control System

The Yankee Hood System incorporates an optimized hot air circulation and heat recovery design to improve thermal efficiency. By recovering waste heat and reducing unnecessary energy losses, the system helps lower steam consumption, energy costs, and carbon emissions.

3. Optimized Exhaust Air Control

The specially designed exhaust air management system maintains balanced airflow and stable operating conditions around the Yankee dryer. Effective control of hot, moist exhaust air helps improve drying consistency and reduce air disturbance.

4. Reliable Structure and Easy Maintenance

The robust hood structure is designed to withstand continuous high-temperature operation and repeated thermal cycles. Its practical, accessible design facilitates routine inspection, cleaning, and maintenance, ensuring reliable long-term performance.

Product Introduction

Zhengding Environment has continuously improved and upgraded traditional closed hoods by adopting advanced materials and innovative structural designs, ensuring better performance, optimized structure, and enhanced reliability of the closed hood system.

With excellent thermal insulation and sealing performance, an instant fire protection system, precise zero-position control, and uniform airflow distribution inside the hood, Zhengding Environment’s closed hood provides customers with a reliable and high-performance solution. It effectively protects operators from noise, dust, heat radiation, and humid conditions, creating a clean, comfortable, and pleasant working environment.

The quality, operational convenience, and easy maintenance of Zhengding Environment’s closed hood have been highly recognized by customers.

Product Introduction

Zhengding Environment’s Paper Dust Removal system adopts wet dust removal technology combined with a spray scrubber. Featuring a compact and efficient design with a combined structure of Venturi tubes and cyclone separators, the system effectively removes fine dust particles ranging from 0.1–20 microns. It delivers excellent purification performance, complies with national emission standards, and significantly reduces the risk of dust ignition and explosion.

With extensive project experience, ZDET provides customers with safe, efficient, and comfortable working environments through professional and reliable paper dust control solutions.

Product Introduction

Zhengding Environment’s Heat Recovery equipment includes three mature solutions: steam-to-air, steam-to-water, and air-to-steam heat recovery systems. These systems can be flexibly adapted to different site conditions and papermaking processes, providing customers with integrated waste heat recovery and utilization solutions.

By applying a multi-stage heat recovery system, the equipment maximizes waste heat utilization, continuously improves energy efficiency, and effectively reduces production energy consumption.

Product Introduction

Zhengding Environment’s Web Stabilizer is specially designed for paper machine dryer sections, open draw areas, and single-tier dryer groups. Based on patented high-speed web stabilization technology and optimized aerodynamic design, it creates a uniform and stable airflow field to effectively control web fluttering, vibration, and misalignment. It significantly reduces paper breaks, wrinkles, folds, edge waving, and other web runnability issues.

With optimized pressure matching and stable operation, the system is suitable for wide-width and high-speed paper machines, as well as various paper grades including containerboard, high-strength corrugating medium, specialty cultural paper, and lightweight specialty papers. It helps increase machine speed, improve operating efficiency, and enhance final paper quality.

Product Introduction

Zhengding Environment’s Steam and Condensate system is specially designed for steam heating and condensate recovery in paper mills. Featuring a closed recovery and circulation structure, the system efficiently collects, recovers, and reuses high-temperature condensate generated from steam-consuming equipment such as paper machine dryer sections and hoods, reducing heat loss and water consumption.

The system helps reduce steam consumption and ensures continuous and stable operation of critical equipment, including dryer cylinders and hoods. It also prevents production efficiency and paper quality issues caused by poor drainage, water hammer, condensate accumulation, and steam leakage.

Product Introduction

Zhengding Environment Hot Air Drying Box features a double-layer stainless steel shell filled with 100～150 mm rock wool / aluminum silicate insulation. The temperature rise of the outer shell ≤ ambient temperature +15 ℃. Two types available: 1. Impingement Nozzle Type: Staggered upper and lower nozzles with high heat transfer coefficient, suitable for medium and high basis weight paper. 2. Air Cushion Type: Non-contact support, ideal for thin paper, film and release paper, preventing scratches and sheet fluttering. Applicable width: ≤6600 mm, operating speed: 100～1200 m/min. It delivers uniform drying and stable coating quality. With CFD-optimized nozzle layout and plenum chamber design, the transverse temperature difference is small, effectively eliminating streaks, orange peel defects, color difference and "wet-dry edge" issues.

It is mainly used for water-based or solvent-based coatings applied on the surface of paper, paperboard, film or substrates. By hot air with controllable temperature, wind speed, humidity and airflow organization, convective heat transfer is carried out to rapidly evaporate water or solvents, so as to finally form continuous, flat and firmly adhered coatings.

It supports zoned regulation on demand, featuring remarkable energy saving, strong adaptability, reliable operation and easy maintenance.

Product Introduction

Zhengding Environment’s Air Steering Device adopts a non-contact air flotation web guiding design, integrating web turning, web alignment correction, and hot air drying functions into one system. The air cushion supports the paper web throughout the entire process without friction or surface damage, while simultaneously achieving web steering correction and online drying. Its integrated structure simplifies production line configuration.

The system effectively improves the quality of finished products such as coated paper and laminated adhesive paper, and is suitable for various paper converting and finishing production lines.