Is there an economic model for recycling and reusing industrial flue gas desulfurization byproducts?

In modern industrial production, industrial flue gas desulfurization technology has been widely used to reduce sulfide emissions and improve air quality. If the by-products produced during the desulfurization process are not properly treated and utilized, these by-products may become a source of environmental pollution and even increase the operating costs of enterprises.

Gypsum, as one of the common desulfurization by-products, is mainly produced by limestone-gypsum desulfurization. Gypsum itself is a high-value building material, especially widely used in the construction industry. Utilizing these by-products, gypsum can be recycled and converted into building gypsum boards, dry-mixed mortar, road construction materials, etc., which not only reduces the accumulation of waste, but also creates new economic benefits for enterprises. The recycling of gypsum not only helps to reduce the environmental burden of enterprises, but also reduces dependence on natural resources, which is in line with the concept of green development.

In some cases, wastewater and ammonia are also common by-products in the desulfurization process. Ammonia, as a highly corrosive substance, often requires special treatment methods to prevent pollution to the environment. However, through advanced technical means, these wastewater and ammonia can sometimes be processed and converted into valuable chemical raw materials. For example, treated ammonia can be used to produce products such as nitrogen fertilizer and liquid ammonia, or to generate other useful chemicals through chemical reactions. This not only helps reduce the cost of wastewater treatment, but also converts it into raw materials for industrial production, thereby improving overall economic benefits.

With the improvement of environmental awareness, more and more companies are beginning to adopt innovative technologies to further improve the recovery efficiency of by-products. For example, some advanced desulfurization technologies convert by-products into reusable energy or chemicals by optimizing the process flow. Through these technologies, companies can reduce pollution emissions while improving resource utilization, achieving a win-win effect.

Recycling desulfurization by-products is not without challenges. The recycling process of by-products often requires a lot of equipment and technology, which may mean a higher initial investment for small and medium-sized enterprises. The market demand and price fluctuations for recycling and reuse may also affect the economic benefits of enterprises. If the market demand for these by-products is not large, enterprises may face difficulties in recycling and low economic benefits.

In addition to technical challenges, policy and regulatory support is also an important factor in promoting the recycling of by-products. The government can encourage enterprises to invest in by-product recovery technology by issuing corresponding environmental protection policies and regulations. For example, tax incentives and subsidy policies can be given to encourage enterprises to increase investment in environmental protection. Regulatory authorities should strengthen supervision of the by-product recycling process to ensure that it meets environmental protection standards and avoid new pollution to the environment after by-product recycling.