Air Quality Management
● Strategy: Reduce the environmental impact of air pollutant emissions to improve the air quality
● Goals of 2030：SOx -42%、NOx -45%、TSP -65% (Base year: 2019)
To promote air pollution reduction, in addition to the regular testing of the boiler equipment and exhaust pipe, the Houli Mill and Tayuan Mill set up automated and continuous air quality monitoring facilities and connected them to the equipment of the competent authority to ensure compliance of the emissions with laws and regulations. Improvement measures are taken for the pollutants on an ongoing basis and the following three phases are designed for the improvement: source management, process system optimization, and end control. The source management includes reducing the consumption of coal, heavy oil, and other fossil fuels by integrating energy resources. We have also set long-term reduction targets to reduce air continuously.
After building an indoor coal yard in Houli Mill in 2019 to reduce dust effusion, we continue to add a dust prevention equipment over the top access of the coal bunker, water spray and foal dust removal equipment, and bag-type dust collector fly ash air conveyor system in 2020. We also built the SCR* control equipment at Tayuan Mill, and installed other SCR control equipments at Hsinchu Mill and Chupei Mill in 2021. The Tayuan Mill also added desulfurization equipment to the wastewater treatment plant, while the Houli Mill increased the purchase of electricity generated from cogeneration. Each plant is actively working to improve air quality. In addition, the company actively procures high-quality coal, and the sulfur content of the coal purchased in 2022 has been reduced to 0.4%, compared to 0.8% in 2019, resulting in a 50% reduction and a significant decrease in SOx emissions. The sulfur content in the past three years was 0.44% in 2020, 0.45% in 2021, and 0.4% in 2022. The Paper Products Division has also been replacing the fuel boilers in all paper product plants since 2013, with the project completed in 2020. This not only saves fuel costs but also reduces air pollution, achieving a win-win outcome for environmental sustainability and business growth.
*SCR（Selective Non-Catalytic Reduction）is the technology to remove NOx from flue gas
CLC Houli Mill:
Taiwan's first mill with an indoor coal yard
Houli Mill initiated the construction of the new indoor coal yard in 2017 and was completed in March 2019. The coal yard covers up to about 20.6% of the coal of the mill. The coal bunker consists of three sections and care store three different types of coals for use by boilers from different burning characteristics to enhance bunker control efficiency and prevent spontaneous combustion of coal through turning prevention. We also constantly assess the construction of coal bunker in other mills to enhance coal efficiency.
Taiwan's first papermaker using gas boilers in all container box plants
In 2013, we began to fade out the fuel-oil boiler of all container box plants and had completed the modification project of in five container box plants: Panchiao, Tayuan, Miaoli, Taichung, and Yenchao. In 2019, supporting the "Industry Low-Carbon Application Project" of the Chiayi County Government, the Talin plant has activated the gas-fired boiler modification project in January 2020. After using gas-fired boilers in all container box plants, the combustion efficiency increased by over 5%, GHG emissions reduced by 27%, NOx emissions reduced by 63%, and TSP emissions reduced by 93%*.* Calculated according to the "Regulations Governing the Emission Coefficients, Control Efficiency, and Other Quantification Rules for the Declaration of the Air Pollution Control Fees for Particulates, Lead, Cadmium, Mercury, Arsenic, Hexavalent Chromium, and Dioxin at Public and Private Stationary Pollution Sources".
To resolve the odor problems in paper mills, our efforts in process improvement and system optimization have borne fruit. All units also inventory the odor sources and make the odor maps to focus on the improvement countermeasures. In endpoint control, we build high-efficiency air pollution control equipment to effectively control air pollution emissions. In 2022, the Company receive no fine for odors from air pollution.