I. Project Overview

Project Name: Huaneng Shidongkou Thermal Power Co., Ltd. Desulfurization Wastewater Zero Discharge Project

Project Owner: Huaneng Shidongkou Thermal Power Co., Ltd.

Project Location: Baoshan District , Shanghai

Core equipment: DN6300*18100 FRP (fiberglass reinforced plastic) concentration tower

Services include: core equipment design, manufacturing, installation, commissioning, and technical support.

Contractor: Hebei Weitong Fiberglass Co., Ltd.

Huaneng Shidongkou Power Plant, a key power source for the East China Power Grid, actively responds to national environmental protection policies and is committed to building a green, low-carbon, and efficient modern coal-fired power plant. Its zero-discharge desulfurization wastewater project is a crucial step in achieving comprehensive wastewater utilization and eliminating environmental pollution. In this project, Hebei Weitong Fiberglass Co., Ltd., leveraging its strong technical capabilities and extensive project experience, successfully manufactured the core equipment of the system—the ultra-large-scale fiberglass thickening tower.

II. Core Challenges and Technological Requirements

Desulfurization wastewater has a complex composition, containing high concentrations of chloride ions, sulfate ions, heavy metals, and suspended solids, and is characterized by strong corrosivity and a tendency to scale. Given the large-capacity processing requirements of the Shidongkou project, extremely high demands are placed on the core thickening tower equipment:

Stability of ultra-large structure: The equipment has a diameter of 6.3 meters and a total height of over 18 meters. It is an ultra-large composite material equipment, and its structural design, molding, hoisting, transportation and installation are extremely difficult.

Excellent corrosion resistance: It must be able to withstand the alternating corrosion of various high-concentration acid, alkali and salt media in desulfurization wastewater for a long time, ensuring a service life of more than 20 years for the equipment.

High-precision manufacturing requirements: The installation and docking requirements of tower internals (such as water distribution devices, packing supports, demisters, etc.) are extremely high to ensure uniform water flow distribution and stable mass transfer efficiency, which is the basis for achieving the "zero emission" process target.

Strict environmental and safety standards: The equipment must be completely sealed and leak-free to meet the stringent requirements of power plant safety production and environmental emissions.

III. Hebei Weitong Solutions

To address these challenges, Hebei Weitong Fiberglass Co., Ltd. has assembled a dedicated technical team to provide customers with a one-stop customized solution from design to installation.

Innovative Design and Structural Optimization:

Advanced finite element analysis (FEA) software is used to perform mechanical simulation calculations on the tower structure, optimize the winding profile and wall thickness distribution, and ensure the absolute safety of the equipment under full load operation, wind load, and seismic load.

To address the challenges of ultra-large diameter, a segmented modular design was adopted, which not only ensured manufacturing precision but also solved the problems of transportation and on-site assembly.

Advanced Materials and Processes:

Vinyl ester resin is used as the inner lining and main structural material. This material has excellent high temperature resistance, acid and alkali corrosion resistance and impermeability, which far exceeds traditional materials such as PP and stainless steel.

The main winding layer uses alkali-free glass fiber and a high-performance resin system. It is precisely wound by a computer-controlled winding machine to ensure uniform fiber tension and accurate resin content, giving the tower body extremely high mechanical strength and rigidity.

Precision manufacturing and quality control:

The products are manufactured in a cleanroom with constant temperature and humidity, and the entire process strictly adheres to the ISO9001 quality management system.

Each layer of resin coating and each layer of fiber winding undergoes rigorous inspection, and the finished product is subjected to 100% non-destructive testing to ensure that there are no bubbles, no delamination, and no defects.

Professional installation and teamwork:

An experienced professional installation team was dispatched to the site to work closely with the owner and general contractor, overcoming difficulties such as narrow space and high-altitude operations.

High-precision instruments were used for measurement and positioning, ensuring the accurate docking of the segmented tower body and the correct installation of the tower internals, thus successfully completing the installation task.

IV. Project Outcomes and Value

Successful Application: The DN6300*18100 fiberglass thickening tower has been successfully installed at Huaneng Shidongkou Power Plant. It operates stably, performs excellently, and fully meets the design parameter requirements.

High efficiency and stability: The equipment's excellent corrosion resistance and anti-aging properties greatly reduce customers' maintenance costs and downtime risks, providing a solid guarantee for the long-term stable operation of the entire zero-emission system.

Environmental benefits: The commissioning of this equipment has helped the power plant achieve complete resource utilization and zero liquid discharge of desulfurization wastewater, which is of great significance to the protection of the ecological environment of the Yangtze River Estuary and has generated huge social and environmental benefits.

Industry benchmark: This project has set a new record for the large-scale application of fiberglass materials in the field of zero discharge of desulfurization wastewater from thermal power plants in China, demonstrating Hebei Weitong's leading position in the field of high-end environmental protection equipment manufacturing and providing valuable experience and demonstration for similar projects.

Hebei Weitong Fiberglass Co., Ltd. is committed to providing high-performance, long-life, and low-cost fiberglass solutions for industries such as power, chemical, and environmental protection. We look forward to working with you to create a green future through excellent products and professional services!